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The weak grow strong by effrontery, the strong by yielding.

The psychologist must avoid all forms of mental physics.

What can be said at all can be said clearly; and whereof one cannot speak thereof one must be silent.

數(shù)學(xué)中的發(fā)現(xiàn)過(guò)程往往比結(jié)果本身更重要。

我不追隨潮流。我創(chuàng)造潮流。