"One ought to be something in order to be able to do something."

"He who cannot give an account of three thousand years of history remains in darkness, inexperienced, and lives from day to day."

"As soon as you trust yourself, you will know how to live."

"Behavior is a mirror in which everyone displays his own image."

"The man who is born with a talent which he is meant to use finds his greatest felicity in using it."