Christianity neither is, nor ever was a part of the common law.
-Thomas Jefferson, letter to Dr. Thomas Cooper, February 10, 1814
The whole history of these books [the Gospels] is so defective and doubtful that it seems vain to attempt minute enquiry into it: and such tricks have been played with their text, and with the texts of other books relating to them, that we have a right, from that cause, to entertain much doubt what parts of them are genuine.
-Thomas Jefferson, letter to John Adams, January 24, 1814
Ridicule is the only weapon which can be used against unintelligible propositions. Ideas must be distinct before reason can act upon them; and no man ever had a distinct idea of the trinity. It is the mere Abracadabra of the mountebanks calling themselves the priests of Jesus.
-Thomas Jefferson, letter to Francis Adrian Van der Kemp, 30 July, 1816
I concur with you strictly in your opinion of the comparative merits of atheism and demonism, and really see nothing but the latter in the being worshipped by many who think themselves Christians.
-Thomas Jefferson, letter to Richard Price, Jan. 8, 1789
But it does me no injury for my neighbor to say there are twenty gods or no God. It neither picks my pocket nor breaks my leg.
-Thomas Jefferson, Notes on Virginia, 1782
Question with boldness even the existence of a god; because if there be one he must approve of the homage of reason more than that of blindfolded fear.
-Thomas Jefferson, letter to Peter Carr, August 10, 1787
And the day will come when the mystical generation of Jesus, by the supreme being as his father in the womb of a virgin will be classed with the fable of the generation of Minerve in the brain of Jupiter. But may we hope that the dawn of reason and freedom of thought in these United States will do away with this artificial scaffolding, and restore to us the primitive and genuine doctrines of this most venerated reformer of human errors.
-Thomas Jefferson, Letter to John Adams, April 11, 1823
It is between fifty and sixty years since I read it [the Apocalypse], and I then considered it merely the ravings of a maniac, no more worthy nor capable of explanation than the incoherences of our own nightly dreams.
-Thomas Jefferson, letter to General Alexander Smyth, Jan. 17, 1825