What kind of feelings and philosophies did Su Shi express in "Red Cliff Fu" by taking advantage of the breeze on the river and the bright moon in the mountains?

"But the breeze on the river and the bright moon in the mountains make you sound, and when you meet it, you will get color. It is the creator's endless treasure, and my son and I are in a suitable place. " This is Su Shi's negative response to a friend's words, "Flying in the sky and underground is a drop in the ocean. This is the regret of my life. " In fact, this article was also written by Su Shi during his relegation to Huangzhou. Although Su Shi pays attention to his own experience, he still shows an open-mindedness, detachment and optimism here. You don't have to worry about temporary gains and losses, life is impermanent. You should be rational, don't treat things as happiness, and don't treat yourself as sadness.