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I think it's important to have a sense of humor about yourself and not take yourself too seriously.

You cannot always control what goes on outside, but you can always control what goes on inside.

Abstraction is the key to mathematics.

人與人每次見面，如果都好像剛認識時那樣，那么即使相處到老，也不會相互有怨恨之心。

譯文：白云斜斜地掛在蔚藍的天空上，獨自登上高處心中一片悵然。遙想家鄉像什么呢?在那雜亂山峰的深處，一片翠綠如煙。