商场如战场，防人之心不可无。
The most important part of teaching is to teach what it is to know.
There's a real correlation between a society that tells people that they can do anything, and the existence of low self-esteem. So that's another way in which something quite positive can have a nasty kickback. There is another reason why we might be feeling more anxious --about our careers, about our status in the world today, than ever before. And it's, again, linked to something nice. And that nice thing is called meritocracy.
All living creatures are engendered from eggs.
Always plan for the worst and hope for the best.
译文：读书是为了明白事理，做事就应当竭尽自己的心力。