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

I have been asked whether I would agree that the tragedy of the scientist is that he is able to bring about great advances in our knowledge, which mankind may then proceed to use for purposes of destruction. My answer is that this is not the tragedy of the scientist; it is the tragedy of mankind.

Do not destroy what you cannot create.

If one knows only what one is told, one does not know enough to be able to arrive at a well-balanced decision.

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

Don't lie if you don't have to.

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.