The sea accepts hundreds of rivers, and it is great if it has tolerance; if it stands thousands of feet high on the wall, it is strong if it has no desires. This couplet was written by Lin Zexu, a politician in the late Qing Dynasty, when he was the governor of Guangdong and Guangxi. It means: The sea can accommodate hundreds of rivers because of its vastness; the mountains can be so tall because they have no intrigues and desires. The last words in the upper and lower lines - "big" and "strong", mean that this awe-inspiring spirit is the greatest and strongest. It also shows the author's awe-inspiring aura. This kind of open-mindedness and the uprightness of "standing against the wall" come from "no desire". This kind of tolerance, "desireless" feelings and the most powerful aura are indispensable vitamins for mental health.