Philosophy is tested and characterised by the way in which it appropriates its history.

An ideology is a complex of ideas or notions which represents itself to the thinker as an absolute truth for the interpretation of the world and his situation within it; it leads the thinker to accomplish an act of self-deception for the purpose of justification, obfuscation and evasion in some sense or other to his advantage.

The Greek word for philosopher (philosophos) connotes a distinction from sophos. It signifies the lover of wisdom (knowledge) as distinguished from him who considers himself wise in the possession of knowledge. This meaning of the word still endures: the essence of philosophy is not the possession of the truth but the search for truth. ... Philosophy means to be on the way. Its questions are more essential than its answers, and every answer becomes a new question.

We must learn to talk with each other, and we mutually must understand and accept one another in our extraordinary differences.

Greatness of mind becomes an object of love only when the power at work in it itself has a noble character

There is no God, cry the masses more and more vociferously; and with the loss of God man loses his sense of values — is, as it were, massacred because he feels himself of no account.

I began the study of medicine, impelled by a desire for knowledge of facts and of man. The resolution to do disciplined work tied me to both laboratory and clinic for a long time to come.