God is an essence that we know nothing of. Until this awful blasphemy is got rid of, there never will be any liberal science in the world.

I was very strenuous for retaining and insisting on it [law of nature], as a resource to which we might be driven by Parliament much sooner than we were aware.

Indeed, Mr. Jefferson, what could be invented to debase the ancient Christianism, which Greeks, Romans, Hebrews and Christian factions, above all the Catholics, have not fraudulently imposed upon the public? Miracles after miracles have rolled down in torrents, wave succeeding wave in the Catholic church, from the Council of Nicea, and long before, to this day.

Nothing is more dreaded than the national government meddling with religion.

There are persons whom in my heart I despise, others I abhor. Yet I am not obliged to inform the one of my contempt, nor the other of my detestation. This kind of dissimulation...is a necessary branch of wisdom, and so far from being immoral...that it is a duty and a virtue.

The idea of infidelity [a disbelief in the inspiration of the Scriptures or the divine origin of Christianity] cannot be treated with too much resentment or too much horror. The man who can think of it with patience is a traitor in his heart and ought to be execrated [denounced] as one who adds the deepest hypocrisy to the blackest treason.

The Hebrews have done more to civilize men than any other nation: The doctrine of a supreme, intelligent sovereign of the universe, I believe to be the great essential principle of all morality, and consequently of all civilization.