A wise man is a wise man. Smart people are quick-thinking, active in thinking, and active in temperament through rational thinking, so they use water as a metaphor.
A benevolent person is also a kind person. Good-hearted people are content with justice, kind and tolerant, but not impulsive, quiet and stable, so use mountains as a comparison.
Benevolent people are peaceful, steady, as calm as a mountain, as steady as Mount Tai, unmoved by external things, as open arms as a mountain, tolerant of kindness, not serving, not hurting things, not worrying or fearing, and live a long life. It is the so-called benevolent Leshan. Isn't it the same to be a man?
It is vivid and profound to describe mountains and rivers as different people have different opinions. This is just like Zhu's exposition in The Analects of Confucius: "Without a deep understanding of benevolence and wisdom, we can never make such a description." The sage has both wisdom and benevolence, so the patent right of this description belongs to him.