Both the man of science and the man of art live always at the edge of mystery, surrounded by it. Both, as a measure of their creation, have always had to do with the harmonization of what is new with what is familiar, with the balance between novelty and synthesis, with the struggle to make partial order in total chaos.... This cannot be an easy life.

Science is not everything, but science is very beautiful.

Today, it is not only that our kings do not know mathematics, but our philosophers do not know mathematics and - to go a step further - our mathematicians do not know mathematics.

Things which stimulate my curiosity are pretty far removed from the practical and therefore from classification.

Sometimes the answer to fear does not lie in trying to explain away the causes, sometimes the answer lies in courage.

Truth, not a pet, is man's best friend.

There are children playing in the streets who could solve some of my top problems in physics, because they have modes of sensory perception that I lost long ago.