No one is so eager to gain new experiences as he who doesn't know how to make use of the old ones.

Have patience with the quarrelsomeness of the stupid. It is not easy to comprehend that one does not comprehend.

There are times when to be reasonable is to be cowardly.

When curiosity turns to serious matters, it's called research.

Conquer but never triumph.

You stay young as long as you can learn, acquire new habits, and suffer contradictions.

Kindness which is not inexhaustible does not deserve the name.