I don't like returning good for evil. I just like the wind and water turn. What do you mean?

The wind and water turn: that is to say, good people will not always belong to you, good luck will not always follow you, good things will not always come to you, your life will not always be smooth sailing, and there will be times when you don't want to drink cold water, which is the same as thirty years in Hedong and thirty years in Hexi. All show that a person's life is a life of ups and downs, an unsettled life and an unchangeable life.