He, who is content with the least, is the richest, for content is the wealth of nature.
知足常乐者最富有，因为知足本身就是天然的财富。

Unless you try to do something beyond what you have already mastered, you will never grow.
只有去尝试做一些你不熟悉的事情你才能有所成长。
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You have to believe in yourself. That's the secret of success.--Chaplin
人必须相信自己，这是成功的秘诀。——卓别林