The author begins by analyzing the psychological roots of superstition, which he attributes not to a genuine universal notion of the divine, but to the fluctuating hopes and fears of human beings driven by uncertain fortune. People fall prey to credulity and irrationality when in adversity, mistaking external ceremonies and the pronouncements of prophets for true religion. In free states, however, such manipulative dogmatism destroys public peace, whereas allowing freedom of thought and judgment ensures both piety and stability.
Moving to the nature of prophecy, the text defines a prophet as an interpreter of divine revelations. Spinoza argues that prophecy does not convey specialized knowledge of natural or spiritual phenomena, but relies on the vivid imagination of the recipient. Because imagination varies according to individual temperament, physical state, and prior opinions, prophetic revelations were frequently obscure and adapted to the cultural assumptions of the listener. Only Christ received divine revelation immediately through the mind without the aid of physical words or symbolic visions.
The investigation then addresses the vocation of the Hebrews and whether prophecy was unique to them. The author contends that the election of the Hebrew nation had no relation to superior intellect, philosophy, or virtue, but was confined entirely to their social organization, political independence, and the good fortune of their state. Their ceremonial law served strictly to preserve the Hebrew kingdom through external obedience rather than to secure individual spiritual blessedness, which remains universally accessible to all humans through the light of natural reason.
Differentiating between human and divine law, Spinoza establishes that natural divine law is universal, independent of historical narratives, and requires no ceremonial acts. Its sole reward is the intellectual love of God, which is identical to human perfection. The scriptures themselves, when interpreted impartially without human dogmatic assumptions, support the supremacy of natural reason. Consequently, obedience and morality constitute the core of revealed religion, entirely separate from speculative philosophy.
Finally, the treatise addresses the function of the ceremonial law and biblical narratives. Ceremonial observances were temporary measures designed to maintain political order and obedience among a formerly enslaved people rather than eternal requirements for salvation. While biblical histories are useful for instructing the masses who lack philosophical capacity, the truth of these narratives has no bearing on the universal divine law. True blessedness consists in living justly and charitably by the light of reason and love, which fulfills the true spirit of divine teaching.
