There are two possible outcomes: if the result confirms the hypothesis, then you've made a measurement. If the result is contrary to the hypothesis, then you've made a discovery.

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.

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

Never underestimate the joy people derive from hearing something they already know.

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.'

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

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

An experiment disproving a prediction is discovery.

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

Ignorance is never better than knowledge

Maintaining self-respect in the face of a devastating experience is of prime importance.

If you have a sharp bold economic message, you can unite everybody.

I don't really think the outburst is recent; there have always been writers in Appalachia.

Judaism is in a sense a Rabbinic, Talmudic religion, rather than a Biblical religion.

I think I was a terrible husband, I think I'm a terrible boyfriend.

But you were Mine. My child. And I would not give you up.

The Sun in London ran a front page declaring my bum a national treasure. I really did laugh at that. Its not like it can actually do anything, except wiggle.

What would it be like to have not only color vision but culture vision, the ability to see the multiple worlds of others.

We need nature more than nature needs us.

There will be rough nights but joy really does come in the morning.