Experiment is the sole judge of the validity of any idea.

The inside of a computer is as dumb as hell but it goes like mad!

I think a power to do something is of value. Whether the result is a good thing or a bad thing depends on how it is used, but the power is a value.

It is important to realize that in physics today, we have no knowledge of what energy is

A poet once said, "The whole universe is in a glass of wine." We will probably never know in what sense he meant that, for poets do not write to be understood... How vivid is the claret, pressing its existence into the consciousness that watches it! If our small minds, for some convenience, divide this glass of wine, this universe, into parts - physics, biology, geology, astronomy, psychology, and so on - remember that nature does not know it! So let us put it all back together, not forgetting ultimately what it is for. Let it give us one more final pleasure: drink it and forget it all!

There was a time when the newspapers said that only twelve men understood the theory of relativity. I do not believe there ever was such a time ... On the other hand, I think I can safely say that nobody understands quantum mechanics.

[B]eyond poverty, beyond the point that the material needs are reasonably satisfied, only from within is peace.