对任何思考者来说，最大的挑战是以一种允许解决的方式表述问题。
农时：指春耕、夏耘、秋收三个时令。与其等灾荒来了再想办法补救，不如早防备灾荒，而防备灾荒最好就是抓住农时。
"In the long run, the only sustainable source of competitive advantage is your ability to learn faster than your competition."
