That which is now called natural philosophy, embracing the whole circle of science, of which astronomy occupies the chief place, is the study of the works of God, and of the power and wisdom of God in his works, and is the true theology.

...It would be more consistent that we call [the Bible] the work of a demon than the word of God. It is a history of wickedness that has served to corrupt and brutalize mankind.

Kill the king but spare the man.

Priests and conjurors are of the same trade.

I disbelieve all holy men and holy books.

Every person of learning is finally his own teacher.

Nothing, they say is more certain than death, and nothing more uncertain than the time of dying