Success is not the key to happiness. Happiness is the key to success.

Natural selection is the only known natural process that can build functional complexity.

Life is made up of sobs, sniffles, and smiles, with sniffles predominating.

赏赐并不能让人欢喜,责罚也不能让人畏惧。

I don't think you need to be sad to write a sad song.

注释：恭敬、节俭、谦逊、守礼，这样才能自我坚守。深谋远虑，这样才能避免困厄。亲近仁德之士、结交正直之人，这样才能在危难时得到帮助。