所有的事情——除了爱——都应该从退出策略开始。要对结束做好准备。几乎所有事情都是进入容易抽身难。
In all things — except love — start with the exit strategy. Prepare for the ending. Almost anything is easier to get into than out of.
Those who keep learning，will keep rising in life.
The best way to learn mathematics is to do mathematics.