“Credulity [...] is not a crime, but it becomes criminal by resisting conviction. It is strangling in the womb of the conscience the efforts it makes to ascertain truth. We should never force belief upon ourselves in any thing.”
1790s, The Age of Reason, Part II (1795), The New Testament
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Thomas Paine 262
English and American political activist 1737–1809Related quotes

Speech in the House of Commons (20 November 1980) http://www.margaretthatcher.org/document/104446 regarding the Irish hunger strike
First term as Prime Minister
1 St. Tr. (N. S.) 131.
Trial of Sir Francis Burdett (King v. Burdett) (1820)

Source: 1940s–present, Minority Report : H.L. Mencken's Notebooks (1956), p. 217-218

§ 1
1780s, Memorial and Remonstrance Against Religious Assessments (1785)
Context: We hold it for a fundamental and undeniable truth, “that Religion or the duty which we owe to our Creator and the Manner of discharging it, can be directed only by reason and conviction, not by force or violence.” The Religion then of every man must be left to the conviction and conscience of every man; and it is the right of every man to exercise it as these may dictate. This right is in its nature an unalienable right. It is unalienable; because the opinions of men, depending only on the evidence contemplated by their own minds, cannot follow the dictates of other men: It is unalienable also; because what is here a right towards men, is a duty towards the Creator. It is the duty of every man to render to the Creator such homage, and such only, as he believes to be acceptable to him. This duty is precedent both in order of time and degree of obligation, to the claims of Civil Society. Before any man can be considered as a member of Civil Society, he must be considered as a subject of the Governor of the Universe: And if a member of Civil Society, who enters into any subordinate Association, must always do it with a reservation of his duty to the general authority; much more must every man who becomes a member of any particular Civil Society, do it with a saving of his allegiance to the Universal Sovereign. We maintain therefore that in matters of Religion, no man’s right is abridged by the institution of Civil Society, and that Religion is wholly exempt from its cognizance. True it is, that no other rule exists, by which any question which may divide a Society, can be ultimately determined, but the will of the majority; but it is also true, that the majority may trespass on the rights of the minority.

Reg. v. Bradlaugh and others (1883), 15 Cox, C.C. 230.

"On the Harmony of Theory and Practice in Mechanics" (Jan. 3, 1856)
Context: The ascertainment and illustration of truth are the objects; and structures and machines are looked upon merely as natural bodies are; namely, as furnishing experimental data for the ascertaining of principles and examples for their application.<!--p. 176