As long as there will be a man, there will be wars.

The unleashed power of the atom has changed everything save our modes of thinking and we thus drift toward unparalleled catastrophe.

It takes a different kind of thinking to solve a problem than the kind of thinking which produced the problem.

Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world.

Smoke like a chimney, work like a horse, eat without thinking, go for a walk only in really pleasant company.

To raise new questions, new possibilities, to regard old problems from a new angle, requires creative imagination and marks real advance in science.

Science is the century-old endeavor to bring together by means of systematic thought the perceptible phenomena of this world into as thorough-going an association as possible.