Kindliness, friendliness, the courtesy of the heart, are ever-flowing streams of non egoistic impulses, and have given far more powerful assistance to culture than even those much more famous demonstrations which are called pity, mercy, and self-sacrifice.

The courage of all one really knows comes but late in life.

What then in the last resort are the truths of mankind? They are the irrefutable errors of mankind.

One should not understand this compulsion to construct concepts, species, forms, purposes, laws ('a world of identical cases') as if they enabled us to fix the real world; but as a compulsion to arrange a world for ourselves in which our existence is made possible:-we thereby create a world which is calculable, simplified, comprehensible, etc., for us.

He who has a why to live can bear almost any how.

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

Pathetic attitudes are not in keeping with greatness.