"The mountains and seas have their own return dates, and the wind and rain have their own experiences." The next sentence is "when things are difficult, they will eventually make up, and everything will eventually be satisfactory." It means that people who don't belong will eventually dissipate in the sea of people, and those who belong will eventually meet. The regrets left by people who don't belong will eventually be diluted by time, and the right people will eventually bring them happiness.
Moral: Although life is impermanent and there are many changes between people, don't worry, mountains and rivers will meet and will meet again somewhere. It means that there is no banquet that never ends between people, but one day they will meet again, and everyone has two paths in life; Walking with your heart is called a dream. One is to walk with your feet, which is called reality. If the heart goes too slowly, the reality will be pale. If you walk too slowly, your dream won't fly high.