Interfaces keep things tidy, but don't accelerate growth: Functions do.
接口可以使事情保持整洁，但不能加速增长：函数可以做到。
When I got to 40 or so... I had the sense when I looked back over my life I would actually see a mess of decisions， a few of which I had thought about， some of which I had sort of stumbled on， and many that I had no control over whatsoever.
逻辑学的研究是对正确推理原则的研究。
个人是唯一的现实。
To act agreeably to our nature is virtue.
凡是做学问，必须从各个方面都理解透彻，还要更进一步深入理解内在的道理。