"Our goal can only be reached through a vehicle of a pain, in which we must fervently believe, and upon which we must vigorously act. There is no other route to success."

"The repetition of small efforts will accomplish more than the occasional use of great talents."

"The most wonderful discovery made by scientists is science itself."

"If you don't learn to laugh at troubles, you won't have anything to laugh at when you grow old."

"Life is simply the pursuit of something worth dying for."

"When two people love each other, they don't look at each other; they look in the same direction."

"As if a woman ever loved a man for his virtue."

"Two men look out through the same bars; one sees the mud and one the stars."

"Nothing of me is original. I am the combined effort of everybody I've ever known."

"I would like to take you seriously but to do so would affront your intelligence."

"Life is tragic for those who have plenty to live on and nothing to live for."

"Know thyself? A maxim as pernicious as it is ugly. Whoever observes himself arrests his own development. A caterpillar who wanted to know itself well would never become a butterfly."