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出自《三國演義》，梁羽生在《七劍下天山》中引用

The fundamental impulse that sets and keeps the capitalist engine in motion comes from the new consumers' goods, the new methods of production or transportation, the new markets, the new forms of industrial organization that capitalist enterprise creates.

All good writing is swimming under water and holding your breath.

數學的歷史是人類好奇心和創造力的歷史。

Love yourself enough to walk away from anything that doesn't serve you.