Creativity is the residue of time wasted.

There is nothing known as "Perfect". Its only those imperfections which we choose not to see!!

I believe in intuition and inspiration. Imagination is more important than knowledge. For knowledge is limited, whereas imagination embraces the entire world, stimulating progress, giving birth to evolution. It is, strictly speaking, a real factor in scientific research.

Do not worry about your difficulties in Mathematics. I can assure you mine are still greater.

You are right in speaking of the moral foundations of science, but you cannot turn around and speak of the scientific foundations of morality.

I appeal to all men and women, whether they be eminent or humble, to declare that they will refuse to give any further assistance to war or the preparation of war.

We have to do the best we are capable of. This is our sacred human responsibility.