He who establishes his argument by noise and command shows that his reason is weak.

This notion [skepticism] is more clearly understood by asking "What do I know?"

I had rather fashion my mind than furnish it.

Painting myself for others, I have painted my inward self with colors clearer than my original ones. I have no more made my book than my book has made me--a book consubstantial with its author, concerned with my own self, an integral part of my life; not concerned with some third-hand, extraneous purpose, like all other books.

The world is but a school of inquisition; it is not who shall enter the ring, but who shall run the best courses.

There is a sort of gratification in doing good which makes us rejoice in ourselves.

To philosophize is to learn to die.