When one man speaks to another man who doesn't understand him, and when a man who's speaking no longer understands, it's metaphysics.

But for what purpose was the earth formed?" asked Candide. "To drive us mad," replied Martin.

Faith consists in believing what reason cannot.

The true triumph of reason is that it enables us to get along with those who do not possess it.

There is no such thing as an accident. What we call by that name is the effect of some cause which we do not see.

When he to whom one speaks does not understand, and he who speaks himself does not understand, that is Metaphysics.

Let us work without theorizing, tis the only way to make life endurable.