I think it's very important to have a feedback loop， where you're constantly thinking about what you've done and how you could be doing it better.I think that's the single best piece of advice: constantly think about how you could be doing things better and questioning yourself.

我认为循环反馈很重要，这样你可以及时知道自己做得怎么样，是否可以做得更好。最好的忠告是：重复问自己，我是否可以做得更好?

埃隆·马斯克

我不敢说我是天下第一，但我也绝对不会承认我是第二。

李小龙

娣姒者，多争之地也，使骨肉居之，亦不若各归四海，感霜露而相思，伫日月之相望也。

颜之推

师友贵隆亲，古学当自反。师严，然后道尊，道尊，然后民敬学。

韩婴

A sound mind in a sound body， is a short， but full description of a happy state in this World: he that has these two， has little more to wish for； and he that wants either of them， will be little the better for anything else. Men’s happiness or misery is most part of their own making. He， whose mind directs not wisely， will never take the right way； and he， whose body is crazy and feeble， will never be able to advance in it.

健康的精神寓于健康的身体, 这话虽短，但却可完全阐释人生在世幸福之真谛。这二者兼备的人，夫复何求；欠缺其中任意一个的人, 与其他任何事上都难达完美（离更好总会差那么一点点）。人的幸福或痛苦, 大部分是源于自身造就。那些没有理智指引的人永远走不到正确的道路上；而那些身体孱弱的人永远无力抬升内在（的精神或灵魂）。