Whatever Nature has in store for mankind, unpleasant as it may be, men must accept, for ignorance is never better than knowledge.

The fundamental point in fabricating a chain reacting machine is of course to see to it that each fission produces a certain number of neutrons and some of these neutrons will again produce fission.

Young man, if I could remember the names of these particles, I would have been a botanist.

I remember my friend Johnny von Neumann used to say, 'with four parameters I can fit an elephant and with five I can make him wiggle his trunk.'

[on what characteristics Nobel prize winning physicists had in common] I cannot think of a single one, not even intelligence.

Experimental confirmation of a prediction is merely a measurement. An experiment disproving a prediction is a discovery.

An experiment disproving a prediction is discovery.