The history of mankind is a perennial tragedy; for the highest ideals which the individual may project are ideals which he can never realize in social and collective terms.

Love is the motive, but justice is the instrument.

That's why history is not an answer to our problem, because history complicates, enlarges every problem of human existence. Now, the eighteenth and nineteenth centuries didn't believe this.

There was a time when I had all the answers. My real growth began when I discovered that the questions to which I had the answers were not the important questions.

Man is always worse than most people suspect, but also generally better than most people dream.

The chief source of man's inhumanity to man seems to be the tribal limits of his sense of obligation to other men.

Nationalism: One of the effective ways in which the modern man escapes life's ethical problems.