In man's brain the impressions from outside are not merely registered they produce concepts and ideas. They are the imprint of the external world upon the human brain.

Self-confidence is an important ingredient that makes for a successful physicist.

Conferences with open attendance are very important for the stimulation of young people or other people who are new in the field. ... The field of high-energy physics is, as you know, very strongly in the hands of a clique and it is hard for an outsider to enter.

Human existence is based upon two pillars: Compassion and knowledge. Compassion without knowledge is ineffective knowledge without compassion is inhuman.

God is so great, he does not even need to exist.

When things get tough, there are two things that make life worth living: Mozart, and quantum mechanics

Science has become adult I am not sure whether scientists have.

In a Jewish theological seminar there was an hours-long discussion about proofs of the existence of God. After some hours, one rabbi got up and said, God is so great, he does not even need to exist.

It was absolutely marvelous working for Pauli. You could ask him anything. There was no worry that he would think a particular question was stupid, since he thought all questions were stupid.