This volume brings together the three parts of The Age of Reason and several related pieces: an essay on dreams, a note on contradictions between Matthew and Mark, thoughts on a future state, a letter to Thomas Erskine concerning the prosecution of Williams, an address to the Theophilanthropists, an essay on the origin of Freemasonry, a letter to Camille Jordan on priests, bells, and public worship, and a reply to the Bishop of Llandaff. It is therefore not one uninterrupted argument. Its organizing question is consistent, however: what can legitimately give a religious belief authority? The reproduced title page bears the London imprint of J. Watson and the date 1810. The 2010 electronic copy comes from a scan whose publisher warns that image quality falls after the first fifteen pages and that deliberate vertical lines serve as watermarks.

Paine begins Part I by placing his religious opinions under the protection of his American fellow citizens. Freedom of conscience includes the right to revise one's own judgment: anyone who denies another person's right to an opinion makes himself a prisoner of his present belief. Reason is Paine's chosen weapon against error. His political setting matters to the diagnosis. After publishing Common Sense, he expected a revolution in government to be followed by one in religion, because alliances between church and state had shielded established creeds through penalties, prohibitions, and the suppression of open inquiry into first principles.

This attack is not atheistic. Paine professes belief in one God while rejecting the special claims of national religions. Jews, Christians, and Muslims each invoke a divine mission, a mediator, and a revealed book, then condemn the others for unbelief. A communication received directly from God might count as revelation to its original recipient, Paine argues, but a report of it becomes human testimony for everyone else. It depends on memory, language, copying, translation, and the narrator's honesty. A universally divine message should not rest on a chain of reports that most people have no means of verifying.

Against reported revelation Paine sets creation. The visible world speaks without depending on any particular language, cannot be forged by a copyist, and remains open to every nation. Its immensity displays the Creator's power; its order, wisdom; its abundance, benevolence. This natural theology also yields a moral rule: imitate the goodness visible in creation, act benevolently toward other people, and reject cruelty to animals as well as persecution and revenge. Paine's opening profession of faith thus establishes the book's governing standard. Scripture cannot be used as the measure of God. Scripture must itself be tested by reason, moral experience, and the stable order of the created world.

Part I develops the positive side of Paine's deism. Astronomy, geometry, and mechanics become forms of theological knowledge because human beings discover their principles but do not create them. A person can manufacture a lever, not the principle by which it acts; drawn figures perish, but their mathematical properties remain. Planetary motion, predictable eclipses, and a plurality of worlds appear to Paine more fitting expressions of constant divine power than the local narratives of revealed religion. He charges Christian schools with replacing the sciences by the study of ancient languages, then persecuting discoveries that exposed errors in their inherited cosmology.

The critical side challenges the Incarnation, Trinity, Fall, and Redemption. Paine connects elements of Christianity with ancient mythology and argues that punishing an innocent person for the guilty follows the logic of financial debt, not moral justice. He treats mystery, miracle, and prophecy as three devices for producing assent. An extraordinary appearance may arise from a misunderstood natural event, an optical illusion, coordinated action, or an embellished report. A loose prediction can be adjusted retrospectively. Such means do not confirm a doctrine for him; they introduce suspicion where a communication from God ought to possess evidence proportionate to its supposed author.

Part II turns this general position into textual investigation. Paine distinguishes truths demonstrated independently of authorship, such as Euclidean geometry, from narratives whose credibility depends on a witness's identity, date, and competence. He then challenges traditional biblical attributions. The account of Moses's death, third-person narration, later place names, and references to Israelite kings are used to deny Mosaic authorship of the Pentateuch. He also identifies two creation narratives that he considers incompatible, followed by anachronisms in the Flood story, including a division between clean and unclean animals before the Mosaic law existed.

He applies the same method to Joshua, Judges, Samuel, Kings, Chronicles, and the prophetic books. By comparing episodes, internal dates, repetitions, and changes of perspective, Paine argues that these works are late anonymous compilations. He joins the textual case to a moral indictment: massacres attributed to Moses and the brutalities of kings cannot, in his judgment, represent a benevolent Creator. Some of his historical claims are more conjectural. He proposes, for example, that Job is Persian or Chaldean because of its dramatic form, astronomical imagery, and lack of distinctively Jewish law or ceremony. Yet he praises Job as sublime, scientific, and orderly, especially when God speaks from the whirlwind. Rejecting its place in the Hebrew canon does not prevent him from recognizing its literary power.

Part III narrows the inquiry to passages from the Old Testament that the Gospels present as prophecies of Jesus. Paine restores each phrase to its immediate setting. Isaiah's sign to Ahaz must concern the current political emergency, he argues, because it is to be fulfilled before a child can distinguish good from evil. In Hosea, the son called out of Egypt is Israel, and the passage continues with Israel's idolatry. Zechariah's return to Jerusalem concerns Jews coming back from captivity. The divided garments in a psalm belong to the poem's suffering speaker. Once replaced in context, these phrases no longer perform the messianic role assigned to them by Matthew, Mark, or later interpreters.

His decisive contention concerns a method of composition rather than any single interpretation. A New Testament writer first relates an event about Jesus, then extracts a few similar words from an older text. The surrounding language, historical situation, and sometimes the rest of the sentence contradict the new application. Paine works through Joseph's dreams, Herod's threatened child, the entry into Jerusalem, the thirty pieces of silver, the unbroken bones, and the promised messenger. He also faults Mark for placing material from Malachi and Isaiah under one attribution. Prophetic proof thus becomes, in his analysis, a practice of detached quotation rather than sustained prediction.

The New Testament inquiry widens the charge. Paine compares genealogies, the reported hour of the Crucifixion, the inscriptions on the cross, the guard at the tomb, and accounts of the Resurrection. Their differences persuade him that the writers were not direct witnesses. Paul's statement that more than five hundred people saw the risen Jesus remains, he stresses, the testimony of one man rather than of five hundred. If the Ascension were meant publicly to confirm a universal mission, it should have occurred in a manner beyond dispute. Paine does not deny a historical Jesus with equal certainty; he treats such a person's existence as possible and largely irrelevant to whether later traditions establish divine revelation.

The appended essays explain the psychology behind this criticism. In “An Essay on Dreams,” imagination, judgment, and memory are the mind's chief faculties. During sleep they no longer work together with waking regularity. Imagination can act every role in a dream, asking questions and supplying answers, but it cannot recover information genuinely unknown to the dreamer. Dreams therefore cannot authenticate religious claims. Paine's thoughts on a future state are more restrained. He considers continued existence probable because the power that first gave life can preserve it in another form, but he refuses to turn that hope into a detailed anatomy of resurrection. Moral destiny is instead connected with humane action. Feeding the hungry, receiving strangers, visiting the sick, and helping prisoners matter more than disputes over ceremonies or professions of belief.

The final group of writings carries the inquiry from biblical canons into public institutions. In his letter to Erskine, Paine returns to the nature of proof in connection with the prosecution of Williams. If a book is declared to be the word of God, the relevant task is to demonstrate that attribution, not to punish someone for disputing it. He also questions whether a special jury of merchants or country gentlemen is qualified to decide theology. The issue is juridical as well as religious: the prestige of a claim does not establish its origin, and a prosecution for blasphemy cannot supply the authentication that the disputed book lacks.

The discourse to the Theophilanthropists presents a communal form compatible with Paine's deism. The society's name joins God, love, and humanity. It seeks principles shared by different sects without becoming another sect, draws moral precepts from writers of many countries and periods, and organizes religious and moral observances linking the adoration of God with friendship among human beings. Paine urges it to teach science as the study of the Creator's works, supported by instruments for explaining astronomy and natural philosophy. His social criticism follows directly. Money spent on priests, ceremonies, processions, and bells would be better used to relieve poverty and educate children. He offers the Quakers, who have no priests and avoid theatrical worship, as a partial example, and judges one capable schoolmaster more useful than a hundred priests.

The essay on Freemasonry extends his search for origins into more speculative territory. Paine rejects Masonic genealogies that transmit the craft from Babel through Euclid to Hiram because their chronology is impossible. He instead connects the east-west orientation of lodges, solar positions, white garments, and other emblems with ancient sun worship, the Druids, and Egyptian or Persian traditions. He similarly links parts of Genesis with the zodiac and Zoroastrian religion. Here his comparative method relies on analogies among rituals, symbols, and numbers. These proposals should be distinguished from his narrower textual observations. They are Paine's reconstructions, not conclusions independently demonstrated by the volume.

The governing line nevertheless remains clear. Paine separates belief in God from obedience to churches, morality from profession of faith, and factual inquiry from compulsory reverence for books. His strongest questions are verifiable ones: who is speaking, when could the text have been written, do parallel accounts agree, and does a quotation retain its meaning in context? His limitations lie in abusive rhetoric, the confidence with which he advances some hypotheses of origin, and a tendency to treat inconsistency as evidence of deliberate fabrication. What he finally offers is not a detailed doctrine of God or the afterlife, but a discipline of verification: test attributions, refuse to let mystery replace evidence, judge religion by its moral effects, and seek knowledge of the Creator in the common creation rather than in the monopoly of a clerical order or a single book.