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.

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.

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

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.'

I hope it won't take long.

It is not good to try to stop knowledge from going forward. Ignorance is never better than knowledge.