Do your work for six years; but in the seventh, go into solitude or among strangers, so that the memory of your friends does not hinder you from being what you have become.

Those individuals who give moral considerations a much greater weight than considerations of expediency represent a comparatively small minority, five percent of the people perhaps. But, In spite of their numerical inferiority, they play a major role in our society because theirs is the voice of the conscience of society.

Pronouncement of experts to the effect that something cannot be done has always irritated me.

If the thickness is larger than the critical value I can produce an explosion.

If you want to succeed in the world, you don't have to be much cleverer than other people. You just have to be one day earlier.

A scientist's aim in a discussion with his colleagues is not to persuade, but to clarify.

We turned the switch, saw the flashes, watched for ten minutes, then switched everything off and went home. That night I knew the world was headed for sorrow.