释义：能不说的话就不必多说，走路时要谨慎慢行，不要随意乱走。
我购物故我在。
数学之美在于它能够揭示现实的隐藏结构。
People are curious. A few people are. They will be driven to find things out, even trivial things. They will put things together, knowing all along that they may be mistaken. You see them going around with notebooks, scraping the dirt off gravestones, reading microfilm, just in the hope of seeing this trickle in time, making a connection, rescuing one thing from the rubbish.
君子不用水来当镜子，而是拿别人来当镜子。用水当镜子可以看到的是容貌，用人当镜子则可以知道吉凶对错。