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A good mathematician should be both rigorous and imaginative.

Old minds are like old horses; you must exercise them if you wish to keep them in working order.

心理學(xué)是研究心理過程的科學(xué)。

Character is doing the right thing when nobody's looking. There are too many people who think that the only thing that's right is to get by, and the only thing that's wrong is to get caught.

We're not going to run out of ammunition.

I like to be involved in every aspect of my music.