What is called a republic, is not any particular form of government ... it is naturally opposed to the word monarchy, which means arbitrary power.

Of all the tyrannies that affect mankind, tyranny in religion is the worst.

My mind is my own church.

It is, I believe, impossible to find in any story upon record so many and such glaring absurdities, contradictions, and falsehoods, as are in the books [The Gospels of Matthew, Mark, Luke & John]. They are more numerous and striking than I had any expectation of finding, when I began this examination.

O ye that love mankind! Ye that dare oppose, not only the tyranny, but the tyrant, stand forth! Every spot of the old world is overrun with oppression. Freedom hath been hunted round the globe. Asia, and Africa, have long expelled her. Europe regards her like a stranger, and England hath given her warning to depart. O! receive the fugitive, and prepare in time an asylum for mankind.

Man cannot make, or invent, or contrive principles; he can only discover them; and he ought to look through the discovery to the Author.

Of all the systems of religion that ever were invented, there is no more derogatory to the Almighty, more unedifying to man, more repugnant to reason, and more contradictory to itself than this thing called Christianity. Too absurd for belief, too impossible to convince, and too inconsistent for practice, it renders the heart torpid or produces only atheists or fanatics. As an engine of power, it serves the purpose of despotism, and as a means of wealth, the avarice of priests, but so far as respects the good of man in general it leads to nothing here or hereafter.