The life of man is of no greater importance to the universe than that of an oyster.

The Crusades - the most signal and most durable monument of human folly that has yet appeared in any age or nation.

If we take in our hand any volume; of divinity or school metaphysics, for instance; let us ask, Does it contain any abstract reasoning concerning quantity or number? No. Does it contain any experimental reasoning concerning matter of fact and existence? No. Commit it then to the flames: for it can contain nothing but sophistry and illusion.

When anyone tells me that he saw a dead man restored to life, I immediately consider with myself whether it be more probable that this person should either deceive or be deceived or that the fact which he relates should really have happened. I weigh the one miracle against the other and according to the superiority which I discover, I pronounce my decision. Always I reject the greater miracle. If the falsehood of his testimony would be more miraculous than the event which he relates, then and not till then, can he pretend to command my belief or opinion.

It is evident, from their method of propagation, that a couple of cats, in fifty years, would stock a whole kingdom; and if that religious veneration were still paid them, it would, in twenty more, not only be easier in Egypt to find a god than a man, which Petronius says was the case in some parts of Italy; but the gods must at last entirely starve the men, and leave themselves neither priests nor votaries remaining.

Scholastic learning and polemical divinity retarded the growth of all true knowledge.

... The idea of God, as meaning an infinitely intelligent, wise and good Being, arises from reflecting on the operations of our own mind, and augmenting, without limit, those qualities of goodness and wisdom.