Our achievements speak for themselves. What we have to keep track of are our failures, discouragements and doubts. We tend to forget the past difficulties, the many false starts, and the painful groping. We see our past achievements as the end results of a clean forward thrust, and our present difficulties as signs of decline and decay.

In running away from ourselves we either fall on our neighbor's shoulder or fly at his throat.

Vaguely at first, then more distinctly, I realized that man is an eternal stranger on this planet.

Absolute faith corrupts as absolutely as absolute power.

All great art is revolutionary because it touches upon the reality of man and questions the reality of the various transitory forms of human society.

There is a time when the word "eventually" has the soothing effect of a promise, and a time when the word evokes in us bitterness and scorn.

Even the sober desire for progress is sustained by faith—faith in the intrinsic goodness of human nature and in the omnipotence of science. It is a defiant and blasphemous faith, not unlike that held by the men who set out to build a "city and a tower, whose top may reach unto heaven" and who believed that "nothing will be restrained from them, which they have imagined to do.