What sentences describe men who can't be changed?

The most representative representative sentences are as follows:

1, a river cannot be changed, and this change is difficult to move;

2. Dogs can't change and eat shit;

3. I don't know repentance;

If a man doesn't change his personality, he must first look at his personality. It doesn't matter if it's a good character. If it is a bad character, it will be very difficult.

King Kong is also right. Stubborn people will never change their minds easily unless they encounter major blows and injuries. After that, there will be two results:

1, become only living for yourself and hurting others selfishly for your own interests;

I suddenly realized that I began to let go, and I began to realize that all this was caused by myself. With the passage of time, my self-cultivation gradually improved and finally surpassed myself before.