The confidant of my vices is my master, though he were my valet.

The greatest joy of a thinking man is to have searched the explored and to quietly revere the unexplored.

By seeking and blundering we learn.

No one knows what he is doing so long as he is acting rightly; but of what is wrong one is always conscious.

Lord Byron is only great as a poet; as soon as he reflects he is a child.

Man knows himself only insofar as he knows the world, becoming aware of it if only within himself, and of himself self only within it. Each new subject, well observed, opens up within us a new organ of thought.

What we agree with leaves us inactive, but contradiction makes us productive.