Curiosity has its own reason for existence.

The only thing that interferes with my learning is my education.

To be sure, it is not the fruits of scientific research that elevate a man and enrich his nature, but the urge to understand, the intellectual work, creative or receptive.

It's no accident that capitalism has brought with it progress, not merely in production but also in knowledge. Egoism and competition are, alas, stronger forces than public spirit and sense of duty.

The ability to portray people in still life and in motion requires the highest measure of intuition and talent.

Violence sometimes may have cleared away obstructions quickly, but it never has proved itself creative.

Man would indeeded be in a poor way if he had to be restrained by fear of punishment and hope of reward after death.