This sentence comes from "Eternal Dragon Slayer", which means that he is strong by others, and the breeze blows the mountain. He let him pass, and the bright moon shone on the river. He is self-defeating, he hates himself, and I am full of anger.
It means that no matter how fierce the enemy is, it can also be regarded as a breeze blowing mountains and a bright moon reflecting the river. Although it can be imposed on me, it can't cause any harm.
Extended concept of doing things:
This is the formula of Jiuyang Zhen Jing in Jin Yong's "Eternal Dragon Slayer": Being strong by him, the breeze blows the mountain; He lived alone, and the bright moon shone on the river. He is self-defeating, he hates himself, and I am full of anger.
The moderate attitude towards life is characterized by not demanding, not tough, not extreme and not radical. It is an easy-going attitude towards life, which is similar to that of Laozi.
No matter how tough others are, I still live my life freely, let nature take its course, and rely on my own integrity. How others get angry has nothing to do with me. I stick to my duty and my personality charm.