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事物的那一面存在着一种是与非,这一面同样也存在着另一种是与非。
It is not enough to observe and experiment, theorize and calculate. One must also imagine.
幸福不是偶然发生的事情。它不是好运或随机机会的结果。它不是金钱可以买到或权力可以命令的东西。它不取决于你外部发生的事情,而取决于你内部发生的事情。
Don't give in to your fears... If you do, you won't be able to talk to your heart.
A mind needs books as a sword needs a whetstone if it is to keep its edge.