“How I wish that somewhere there existed an island for those who are wise and of good will.”

“I do not believe in the God of theology who rewards good and punishes evil. My God created laws that take care of that. His universe is not ruled by wishful thinking, but by immutable laws.”

“All of us who are concerned for peace and triumph of reason and justice must be keenly aware how small an influence reason and honest good will exert upon events in the political field.”

“How can cosmic religious feeling be communicated from one person to another, if it can give rise to no definite notion of a God and no theology? In my view, it is the most important function of art and science to awaken this feeling and keep it alive in those who are receptive to it.”

“Only those who attempt the absurd can achieve the impossible.”

“Those who have the privilege to know have the duty to act.”

“Few are those who see with their own eyes and feel with their own hearts.”