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

The hardest thing to understand in the world is the income tax.

The mathematician knows some things, no doubt, but not those things one usually wants to get from him.

No worthy problem is ever solved within the plane of its original conception.

All that is valuable in human society depends upon the opportunity for development accorded the individual.

The ideals which have always shone before me and filled me with the joy of living are goodness, beauty, and truth. To make a goal of comfort or happiness has never appealed to me; a system of ethics built on this basis would be sufficient only for a herd of cattle.

Logic will get you from A to B. Imagination will take you everywhere.