It is an outcome of faith that nature-as she is perceptible to our five senses-takes the character of such a well formulated puzzle.

I have survived two wars, two wives and Hitler.

...and knowledge is one of the finest attributes of man - though often it is most loudly voiced by those who strive for it the least.

Nobody knows how the stand of our knowledge about the atom would be without him. Personally, [Niels] Bohr is one of the amiable colleagues I have met. He utters his opinions like one perpetually groping and never like one who believes himself to be in possession of the truth.

Life is like riding a bicycle. If you want to stay balanced you've got to keep moving forward.

The value of a man resides in what he gives

You cannot solve current problems with current thinking. Current problems are the result of current thinking.