Smith concludes by saying, that in “the second edition of Berkeley's Essay, and also in a Vindication and Explanation of it (called the Visual Language), very lately published, the author has made some additions to his solution of the said phenomenon; but seeing it still involves and depends on the principle of faintness, I may leave the rest of it to the reader's consideration.” This, which appeared in 1738, is one of the very few early references to Berkeley's New Theory of Vision Vindicated. 368. Sect. 2-51. 369. This sentence is omitted in the author's last edition. 370. What follows to the end of this section is not contained in the first edition. 371. i.e. tangible. 372. Cf. sect. 38; and Theory of Vision Vindicated, sect. 31. 373. “Never”—“hardly,” in first edition. 374. Cf. Appendix, p. 208.—See Smith's Optics, B. I. ch. v, and Remarks, p. 56, in which he “leaves it to be considered, whether the said phenomenon is not as clear an instance of the insufficiency of faintness” as of mathematical computation. 375. A favourite doctrine with Berkeley, according to whose theory of visibles there can be no absolute visible magnitude, the minimum being the least that is perceivable by each seeing subject, and thus relative to his visual capacity. This section is thus criticised, in January, 1752, in a letter signed “Anti-Berkeley,” in the Gent. Mag. (vol. XXII, p. 12): “Upon what his lordship asserts with respect to the minimum visibile, I would observe that it is certain that there are infinite numbers of animals which are imperceptible to the naked eye, and cannot be perceived but by the help of a microscope; consequently there are animals whose whole bodies are far less than the minimum visibile of a man. Doubtless these animals have eyes, and, if their minimum visibile were equal to that of a man, it would follow that they cannot perceive anything but what is much larger than their whole body; and therefore their own bodies must be invisible to them, because we know they are so to men, whose minimum visibile is asserted by his lordship to be equal to theirs.” There is some misconception in this. Cf. Appendix to Essay, p. 209. 376. Those two defects belong to human consciousness. See Locke's Essay, II. 10, on the defects of human memory. It is this imperfection which makes reasoning needful—to assist finite intuition. Reasoning is the sign at once of our dignity and our weakness. 377. Sect. 59. 378. Sect. 80-82. 379. Sect. 88-119 relate to the nature, invisibility, and arbitrary visual signs of Situation, or of the localities of tangible things. Cf. Theory of Vision Vindicated, sect. 44-53. 380. Cf. sect. 2, 114, 116, 118. 381. This illustration is taken from Descartes. See Appendix. 382. Sect. 10 and 19. 383. Sect. 2-51. 384. Omitted in author's last edition. 385. This is Berkeley's universal solvent of the psychological difficulties involved in visual-perception. 386. Cf. sect. 103, 106, 110, 128, &c. Berkeley treats this case hypothetically in the Essay, in defect of actual experiments upon the born-blind, since accumulated from Cheselden downwards. See however the Appendix, and Theory of Vision Vindicated, sect. 71. 387. i.e. tangible things. Cf. Principles, sect. 44. 388. The “prejudice,” to wit, which Berkeley would dissolve by his introspective analysis of vision. Cf. Theory of Vision Vindicated, sect. 35. 389. Thus forming individual concrete things out of what is perceived separately through different senses. 390. This briefly is Berkeley's solution of “the knot about inverted images,” which long puzzled men of science. 391. i.e. perceive mediately—visible objects, per se, having no tactual situation. Pure vision, he would say, has nothing to do with “high” and “low,” “great” and “inverted,” in the real or tactual meaning of those terms. 392. i.e. tangible. 393. e.g. “extension,” which, according to Berkeley, is an equivocal term, common (in its different meanings) to visibilia and tangibilia. Cf. sect. 139, 140. 394. Cf. sect. 93, 106, 110, 128. 395. i.e. real or tangible head. 396. Cf. sect. 140, 143. In the Gent. Mag. (vol. XXII. p. 12), “Anti-Berkeley” thus argues the case of one born blind. “This man,” he adds, “would, by being accustomed to feel one hand with the other, have perceived that the extremity of the hand was divided into fingers—that the extremities of these fingers were distinguished by certain hard, smooth surfaces, of a different texture from the rest of the fingers—and that each finger had certain joints or flexures. Now, if this man was restored to sight, and immediately viewed his hand before he touched it again, it is manifest that the divisions of the extremity of the hand into fingers would be visibly perceived. He would note too the small spaces at the extremity of each finger, which affected his sight differently from the rest of the fingers; upon moving his fingers he would see the joints. Though therefore, by means of this lately acquired sense of seeing, the object affected his mind in a new and different manner from what it did before, yet, as by touch he had acquired the knowledge of these several divisions, marks, and distinctions of the hand, and, as the new object of sight appeared to be divided, marked, and distinguished in a similar manner, I think he would certainly conclude, before he touched his hand, that the thing which he now saw was the same which he had felt before and called his hand.” 397. Locke, Essay, II. 8, 16. Aristotle regards number as a Common Sensible.—De Anima, II. 6, III. 1. 398. “If the visible appearance of two shillings had been found connected from the beginning with the tangible idea of one shilling, that appearance would as naturally and readily have signified the unity of the (tangible) object as it now signifies its duplicity.” Reid, Inquiry, VI. 11. 399. Here again note Berkeley's inconvenient reticence of his full theory of matter, as dependent on percipient life for its reality. Tangible things are meantime granted to be real “without mind.” Cf. Principles, sect. 43, 44. “Without the mind”—in contrast to sensuous phenomenon only. 400. Cf. sect. 131. 401. Sect. 2, 88, 116, 118. 402. In short, we see only quantities of colour—the real or tactual distance, size, shape, locality, up and down, right and left, &c., being gradually associated with the various visible modifications of colour. 403. i.e. tangible. 404. Sect. 41-44. 405. i.e. tangible things. 406. i.e. visible. 407. Cf. sect. 41-44. The “eyes”—visible and tangible—are themselves objects of sense. 408. Cf. Principles, Introduction, sect. 21-25. 409. “Visible ideas”—including sensations muscular and locomotive, felt in the organ of vision. Sect. 16, 27, 57. 410. i.e. objects which, in this tentative Essay, are granted, for argument's sake, to be external, or independent of percipient mind. 411. i.e. to inquire whether there are, in this instance, Common Sensibles; and, in particular, whether an extension of the same kind at least, if not numerically the same, is presented in each. The Kantian theory of an a priori intuition of space, the common condition of tactual and visual experience, because implied in sense-experience as such, is not conceived by Berkeley. Cf. Theory of Vision Vindicated, sect. 15. 412. In the following reasoning against abstract, as distinguished from concrete or sense presented (visible or tangible) extension, Berkeley urges some of his favourite objections to “abstract ideas,” fully unfolded in his Principles, Introduction, sect. 6-20.—See also Alciphron, VII. 5-8.—Defence of Free Thinking in Mathematics, sect. 45-48. 413. Berkeley's ideas are concrete or particular—immediate data of sense or imagination. 414. i.e. it cannot be individualized, either as a perceived or an imagined object. 415. Sect. 105. 416. “Endeavours” in first edition. 417. i.e. a mental image of an abstraction, an impossible image, in which the extension and comprehension of the notion must be adequately pictured. 418. “deservedly admired author,” in the first edition. 419. “this celebrated author,”—“that great man” in second edition. In assailing Locke's “abstract idea,” he discharges the meaning which Locke intended by the term, and then demolishes his own figment. 420. Omitted in the author's last edition. 421. Omitted in last edition. 422. Omitted in last edition. 423. Omitted in last edition. 424. See Principles, passim. 425. Omitted in author's last edition. 426. He probably has Locke in his eye. 427. On Berkeley's theory, space without relation to bodies (i.e. insensible or abstract space) would not be extended, as not having parts; inasmuch as parts can be assigned to it only with relation to bodies. Berkeley does not distinguish space from sensible extension. Cf. Reid's Works, p. 126, note—in which Sir W. Hamilton suggests that one may have an a priori conception of pure space, and also an a posteriori perception of finite, concrete space. 428. Sect. 121. Cf. New Theory of Vision Vindicated, sect. 15. 429. i.e. there are no Common Sensibles: from which it follows that we can reason from the one sense to the other only by founding on the constant connexion of their respective phenomena, under a natural yet (for us) contingent law. Cf. New Theory of Vision Vindicated, sect. 27, 28. 430. Omitted in last edition. 431. Cf. sect. 93, 103, 106, 110. 432. Omitted in last edition. 433. Cf. sect. 43, 103, &c. A plurality of co-existent minima of coloured points constitutes Berkeley's visible extension; while a plurality of successively experienced minima of resistant points constitutes his tactual extension. Whether we can perceive visible extension without experience of muscular movement at least in the eye, he does not here say. 434. Omitted in last edition. 435. Real distance belongs originally, according to the Essay, to our tactual experience only—in the wide meaning of touch, which includes muscular and locomotive perceptions, as well as the simple perception of contact. 436. Added in second edition. 437. Omitted in last edition. 438. See also Locke's “Correspondence” with Molyneux, in Locke's Works, vol. IX. p. 34.—Leibniz, Nouveaux Essais, Liv. II. ch. 9, who, so far granting the fact, disputes the heterogeneity.—Smith's Optics.—Remarks, §§ 161-170.—Hamilton's Reid, p. 137, note, and Lect. Metaph. II. p. 176. 439. Omitted in last edition. 440. Cf. Theory of Vision Vindicated, sect. 70. 441. Cf. sect. 49, 146, &c. Here “same” includes “similar.” 442. i.e. visible and tangible motions being absolutely heterogeneous, and the former, at man's point of view, only contingent signs of the latter, we should not, at first sight, be able to interpret the visual signs of tactual phenomena. 443. Cf. sect. 122-125. 444. Cf. Principles, sect. 111-116; also Analyst, query 12. On Berkeley's system space in its three dimensions is unrealisable without experience of motion. 445. Here the term “language of nature” makes its appearance, as applicable to the ideas or visual signs of tactual realities. 446. Cf. sect. 16, 27, 97. 447. Is “tangible” here used in its narrow meaning—excluding muscular and locomotive experience? 448. i.e. as natural signs, divinely associated with their thus implied meanings. 449. Cf. New Theory of Vision Vindicated, sect. 35. 450. Berkeley, in this section, enunciates the principal conclusion in the Essay, which conclusion indeed forms his new theory of Vision. 451. A suggestion thus due to natural laws of association. The explanation of the fact that we apprehend, by those ideas or phenomena which are objects of sight, certain other ideas, which neither resemble them, nor efficiently cause them, nor are so caused by them, nor have any necessary connexion with them, comprehends, according to Berkeley, the whole Theory of Vision. “The imagination of every thinking person,” remarks Adam Smith, “will supply him with instances to prove that the ideas received by any one of the senses do readily excite such other ideas, either of the same sense or of any other, as have habitually been associated with them. So that if, on this account, we are to suppose, with a late ingenious writer, that the ideas of sight constitute a Visual Language, because they readily suggest the corresponding ideas of touch—as the terms of a language excite the ideas answering to them—I see not but we may, for the same reason, allow of a tangible, audible, gustatory, and olefactory language; though doubtless the Visual Language will be abundantly more copious than the rest.” Smith's Optics.—Remarks, p. 29.—And into this conception of a universal sense symbolism, Berkeley's theory of Vision ultimately rises. 452. Cf. Alciphron, Dialogue IV. sect. 11-15. 453. Sect. 122-125. 454. Sect. 127-138. 455. Some modern metaphysicians would say, that neither tangible nor visible extension is the object geometry, but abstract extension; and others that space is a necessary implicate of sense-experience, rather than, per se, an object of any single sense. Cf. Kant's explanation of the origin of our mathematical knowledge, Kritik der reinen Vernunft. Elementarlehre, I. 456. Cf. sect. 51-66, 144. 457. This is a conjecture, not as to the probable ideas of one born blind, but as to the ideas of an “unbodied” intelligence, whose only sense was that of seeing. See Reid's speculation (Inquiry, VI. 9) on the “Geometry of Visibles,” and the mental experience of Idomenians, or imaginary beings supposed to have no ideas of the material world except those got by seeing. 458. Cf. sect. 130, and New Theory of Vision Vindicated, sect. 57. Does Berkeley, in this and the two preceding sections, mean to hint that the only proper object of sight is unextended colour; and that, apart from muscular movement in the eye or other locomotion, visibilia resolve into unextended mathematical points? This question has not escaped more recent British psychologists, including Stewart, Brown, Mill, and Bain, who seem to hold that unextended colour is perceivable and imaginable. 459. The bracketed sentence is not retained in the author's last edition, in which the first sentence of sect. 160 is the concluding one of sect. 159, and of the Essay. 460. This passage is contained in the Dioptrices of Descartes, VI. 13; see also VI. 11. 461. The arbitrariness or contingency—as far as our knowledge carries us—of the connexion between the visual phenomena, as signs, on the one hand, and actual distance, as perceived through this means, on the other. 462. Cf. sect. 80-83. 463. The reference here seems to be to the case described in the Tatler (No. 55) of August 16, 1709, in which William Jones, born blind, had received sight after a surgical operation, at the age of twenty, on the 29th of June preceding. A medical narrative of this case appeared, entitled A full and true account of a miraculous cure of a Young Man in Newington, who was born blind, and was in five minutes brought to perfect sight, by Mr. Roger Grant, oculist. London, 1709. 464. Cf. New Theory of Vision Vindicated, sect. 71, with the relative note. 465. Omitted on the title-page in the second edition, but retained in the body of the work. 466. Beardsley's Life and Correspondence of Samuel Johnson, D.D., First President of King's College, New York, p. 72 (1874). 467. Beardsley's Life of Johnson, pp. 71, 72. 468. Chandler's Life of Johnson, Appendix, p. 161. 469. Commonplace Book. 470. Moreover, even if the outness or distance of things were visible, it would not follow that either they or their distances could be real if unperceived. On the contrary, Berkeley implies that they are perceived visually. 471. It is also to be remembered that sensible things exist “in mind,” without being exclusively mine, as creatures of my will. In one sense, that only is mine in which my will exerts itself. But, in another view, my involuntary states of feeling and imagination are mine, because their existence depends on my consciousness of them; and even sensible things are so far mine, because, though present in many minds in common, they are, for me, dependent on my percipient mind. 472. Thomas Herbert, eighth Earl of Pembroke and fifth Earl of Montgomery, was the correspondent and friend of Locke—who dedicated his famous Essay to him, as a work “having some little correspondence with some parts of that nobler and vast system of the sciences your lordship has made so new, exact, and instructive a draft of.” He represents a family renowned in English political and literary history. He was born in 1656; was a nobleman of Christ Church, Oxford, in 1672; succeeded to his titles in 1683; was sworn of the Privy Council in 1689; and made a Knight of the Garter in 1700. He filled some of the highest offices in the state, in the reigns of William and Mary, and of Anne. He was Lord Lieutenant of Ireland in 1707, having previously been one of the Commissioners by whom the union between England and Scotland was negotiated. He died in January 1733. 473. Trinity College, Dublin. 474. In his Commonplace Book Berkeley seems to refer his speculations to his boyhood. The conception of the material world propounded in the following Treatise was in his view before the publication of the New Theory of Vision, which was intended to prepare the way for it. 475. Cf. Locke, in the “Epistle Dedicatory” of his Essay. Notwithstanding the “novelty” of the New Principles, viz. negation of abstract or unperceived Matter, Space, Time, Substance, and Power; and affirmation of Mind, as the Synthesis, Substance, and Cause of all—much in best preceding philosophy, ancient and modern, was a dim anticipation of it. 476. Cf. sect. 6, 22, 24, &c.
, in illustration of the demonstrative claim of Berkeley's initial doctrine. 477. Berkeley entreats his reader, here and throughout, to take pains to understand his meaning, and especially to avoid confounding the ordered ideas or phenomena, objectively presented to our senses, with capricious chimeras of imagination. 478. “Philosophy is nothing but the true knowledge of things.” Locke. 479. The purpose of those early essays of Berkeley was to reconcile philosophy with common sense, by employing reflection to make latent common sense, or common reason, reveal itself in its genuine integrity. Cf. the closing sentences in the Third Dialogue between Hylas and Philonous. 480. Cf. Locke's Essay, Introduction, sect. 4-7; Bk. II. ch. 23, § 12, &c. Locke (who is probably here in Berkeley's eye) attributes the perplexities of philosophy to our narrow faculties, which are meant to regulate our lives, not to remove all mysteries. See also Descartes, Principia, I. 26, 27, &c.; Malebranche, Recherche, III. 2. 481. His most significant forerunners were Descartes in his Principia, and Locke in his Essay. 482. Here “idea” and “notion” seem to be used convertibly. See sect. 142. Cf. with the argument against abstract ideas, unfolded in the remainder of the Introduction, Principles, sect. 97-100, 118-132, 143; New Theory of Vision, sect. 122-125; Alciphron, Dial. vii. 5-7; Defence of Free Thinking in Mathematics, sect. 45-48. Also Siris, sect. 323, 335, &c., where he distinguishes Idea in a higher meaning from his sensuous ideas. As mentioned in my Preface, the third edition of Alciphron, published in 1752, the year before Berkeley died, omits the three sections of the Seventh Dialogue which repeat the following argument against abstract ideas. 483. As in Derodon's Logica, Pt. II. c. 6, 7; Philosophia Contracta, I. i. §§ 7-11; and Gassendi, Leg. Instit., I. 8; also Cudworth, Eternal and Immutable Morality, Bk. IV. 484. Omitted in second edition. 485. We must remember that what Berkeley intends by an idea is either a percept of sense, or a sensuous imagination; and his argument is that none of these can be an abstraction. We can neither perceive nor imagine what is not concrete and part of a succession. 486. “abstract notions”—here used convertibly with “abstract ideas.” Cf. Principles, sect. 89 and 142, on the special meaning of notion. 487. Supposed by Berkeley to mean, that we can imagine, in abstraction from all phenomena presented in concrete experience, e.g. imagine existence, in abstraction from all phenomena in which it manifests itself to us; or matter, stripped of all the phenomena in which it is realised in sense. 488. Omitted in second edition. 489. Locke. 490. Descartes, who regarded brutes as (sentient?) machines. 491. “To this I cannot assent, being of opinion that a word,” &c.—in first edition. 492. “an idea,” i.e. a concrete mental picture. 493. So that “generality” in an idea is our “consideration” of a particular idea (e.g. a “particular motion” or a “particular extension”) not per se, but under general relations, which that particular idea exemplifies, and which, as he shews, may be signified by a corresponding word. All ideas (in Berkeley's confined meaning of “idea”) are particular. We rise above particular ideas by an intellectual apprehension of their relations; not by forming abstract pictures, which are contradictory absurdities. 494. Locke is surely misconceived. He does not say, as Berkeley seems to suppose, that in forming “abstract ideas,” we are forming abstract mental images—pictures in the mind that are not individual pictures. 495. Does Locke intend more than this, although he expresses his meaning in ambiguous words? 496. It is a particular idea, but considered relatively—a significant particular idea, in other words. We realise our notions in examples, and these must be concrete. 497. i.e. “ideas” in Locke's meaning of idea, under which he comprehends, not only the particular ideas of sense and imagination—Berkeley's “ideas”—but these considered relatively, and so seen intellectually, when Locke calls them abstract, general, or universal. Omniscience in its all-comprehensive intuition may not require, or even admit, such general ideas. 498. Here and in what follows, “abstract notion,” “universal notion,” instead of abstract idea. Notion seems to be here a synonym for idea, and not taken in the special meaning which he afterwards attached to the term, when he contrasted it with idea. 499. “notions,” again synonymous with ideas, which are all particular or concrete, in his meaning of idea, when he uses it strictly. 500. idea, i.e. individual mental picture. 501. In all this he takes no account of the intellectual relations necessarily embodied in concrete knowledge, and without which experience could not cohere. 502. “have in view,” i.e. actually realise in imagination. 503. What follows, to the end of this section, was added in the second or 1734 edition. 504. So Bacon in many passages of his De Augmentis Scientiarium and Novum Organum. 505. “wide influence,”—“wide and extended sway”—in first edition. 506. “idea,” i.e. individual datum of sense or of imagination. 507. See Leibniz on Symbolical Knowledge (Opera Philosophica, pp. 79, 80, Erdmann), and Stewart in his Elements, vol. I. ch. 4, § 1, on our habit of using language without realising, in individual examples or ideas, the meanings of the common terms used. 508. “doth”—“does,” here and elsewhere in first edition. 509. “ideas,” i.e. representations in imagination of any of the individual objects to which the names are applicable. The sound or sight of a verbal sign may do duty for the concrete idea in which the notion signified by the word might be exemplified. 510. This sentence is omitted in the second edition. 511. Elsewhere he mentions Aristotle as “certainly a great admirer and promoter of the doctrine of abstraction,” and quotes his statement that there is hardly anything so incomprehensible to men as notions of the utmost universality; for they are the most remote from sense. Metaph., Bk. I. ch. 2. 512. Added in second edition. 513. Omitted in second edition. 514. Omitted in second edition. 515. Omitted in second edition. 516. “my own ideas,” i.e. the concrete phenomena which I can realise as perceptions of sense, or in imagination. 517. He probably refers to Locke. 518. According to Locke, “that which has most contributed to hinder the due tracing of our ideas, and finding out their relations, and agreements or disagreements one with another, has been, I suppose, the ill use of words. It is impossible that men should ever truly seek, or certainly discover, the agreement or disagreement of ideas themselves, whilst their thoughts flutter about, or stick only in sounds of doubtful and uncertain significations. Mathematicians, abstracting their thoughts from names, and accustoming themselves to set before their minds the ideas themselves that they would consider, and not sounds instead of them, have avoided thereby a great part of that perplexity, puddering, and confusion which has so much hindered men's progress in other parts of knowledge.” Essay, Bk. IV. ch. 3, § 30. See also Bk. III. ch. 10, 11. 519. General names involve in their signification intellectual relations among ideas or phenomena; but the relations, per se, are unimaginable. 520.