A sure way to irritate people and to put evil thoughts into their heads is to keep them waiting a long time. This makes them immoral.

Too long, the earth has been a madhouse!

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

If you are considering marriage, ask yourself one question: Will I still enjoy talking with her when I'm old?

There is no more dangerous error than that of mistaking the consequence for the cause.

No one is such a liar as the indignant man.

What makes one heroic? - Going out to meet at the same time one's highest suffering and one's highest hope.