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Pain is the price of power.

Physicists cannot explain atoms to their children, not because we are ignorant but because we know too much.

Though today's quantum theory shows no sign of weakness, someday it may collapse.

Physicists, for all their odd notions, are basically a conservative lot.

The quantum world is objective but objectless.

Most everywhere, most of the time, the world dwells in an unmeasured state.

When men are dying every hour, no one looks too hard at one more dead man.

The pragmatist regards any theory as a mere mathematical machine for generating numbers which he then compares with experiment. A pragmatist is concerned with results, not reality. The pragmatist refuses on principle to speculate about deep reality, such a concept being meaningless from his point of view. Pragmatism is an intelectually safe but ultimately sterile philosophy.

You kill men for the wrongs they have done, not the wrongs that they may do someday.

That is how it is when a man grows as old as Pycelle. Everything see or hear reminds you of something yo saw or heard when you were younger.

The quantum world is not made up of objects.

One of the curious features of modern physics is that in spite of its overwhelming success in explaining a vast range of physical phenomena from quark to quasar, it fails to give us a single metaphor for how the universe really works.