计算复杂性的本质是理解什么可以被有效地计算的极限。

译文：人过于贪婪，就像蛇吃掉大象一样可怕，远处的山峰一座还比一座高大。赏析：人的欲望太盛反而会害了自己，贪婪成性，得寸进尺往往会丢掉性命。人做事要量力而行，好高骛远会适得其反。

"Books are the mirrors of the soul."

The purpose of a habit is to remove that action from self-negotiation. You no longer expend energy deciding whether to do it. You just do it. Good habits can range from telling the truth， to flossing

Challenges are what make us grow; embrace them with courage and determination.

这是考验人们灵魂的时刻。