The companies that will thrive are those that can combine scale with agility.

"To be useful was the best thing the old men ever hoped for themselves, and to be aimless was their worst fear."

解释：观察与他交游的人，就知道他的品行好坏。

An athelete may run ten thousand miles in order to prepare for one hundred yards. Quantity gives experience.

不要走别人走过的路，去走没人走过的路并留下足迹。

数学不是一项观赏性运动。你必须参与其中。

学习数学的唯一方法就是做数学。