Great griefs exhaust. They discourage us with life. The man into whom they enter feels something taken from him. In youth, their visit is sad; later on, it is ominous.

The animal is ignorant of the fact that he knows. The man is aware of the fact that he is ignorant.

He loved books; books are cold but safe friends.

Popularity? It's glory's small change.

Philosophy is the microscope of thought. Everything desires to flee from it, but nothing escapes it.

What dangers you run, O noble souls! Often, you give your heart, but we take only your body. Your heart is left to you and you look at it in the shadows and shudder.

Popularity - a piece of faded tinsel, that is out of date.