"A man who wants to do great things must know how to suffer."

"The man of knowledge must be able not only to love his enemies but also to hate his friends."

"The most common lie is that with which one lies to oneself; lying to others is relatively an exception."

"The thought of suicide is a strong consolation: by means of it one gets successfully through many a bad night."

"One must pay dearly for immortality: one has to die several times while one is still alive."