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.

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

When asked what he meant by a miracle: Oh, anything with a probability of less than 20%.

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.

Before I came here I was confused about this subject. Having listened to your lecture I am still confused. But on a higher level.