This has been done elegantly by Minkowski; but chalk is cheaper than grey matter, and we will do it as it comes.

I came to America because of the great, great freedom which I heard existed in this country. I made a mistake in selecting America as a land of freedom, a mistake I cannot repair in the balance of my lifetime.

I like to experience the universe as one harmonious whole. Every cell has life. Matter, too, has life; it is energy solidified. Our bodies are like prisons, and I look forward to be free, but I don't speculate on what will happen to me. I live here now, and my responsibility is in this world now.

Princeton is a wonderful little spot. A quaint and ceremonious village of puny demigods on stilts.

The world we have created is a product of our thinking.

Truly novel inventions emerge only in one's youth. Later one becomes ever more experienced, famous-and foolish.

In art, and in the higher ranges of science, there is a feeling of harmony which underlies all endeavor. There is no true greatness in art or science without that sense of harmony.