What is needed in the present plight of mankind is not more science but a change of heart that shall move mankind to devote to constructive and peaceful purposes.

Humanitarianism needs no apology, even when its objects are Russians or Communists. Unless we recover that concern and feel it toward all men without exception, including those who are on the other side in every fratricidal dispute, we shall have lost the chief redeeming force in human history.

A man can do his best only by confidently seeking (and perpetually missing) an unattainable perfection.

Ignorance deprives people of freedom because they do not know what alternatives there are. It is impossible to choose to do what one has never "heard of."

I prefer credulity to skepticism and cynicism for there is more promise in almost anything than in nothing at all.

If patriotism is the last refuge of a scoundrel, it is not merely because evil deeds may be performed in the name of patriotism, but because patriotic fervor can obliterate moral distinctions altogether.

What is needed in the present plight of mankind is not more science but a change of heart that shall move mankind to devote to constructive and peaceful purposes.