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The ideas of economists and political philosophers， both when they are right and when they are wrong， are more powerful than is commonly understood. Indeed the world is ruled by little else. Practical men， who believe themselves to be quite exempt from any intellectual influence， are usually the slaves of some defunct economist.

We are all just passing through, leaving only shadows behind.

成功不在于金錢或名聲，而在于你對他人產生的影響。

感知是一個主動的過程，大腦從感官輸入中構建意義。