Caring about the past is a process of inner liberation, which stems from the persistence of unfinished things, people or emotions in the past. This persistence will hinder our progress and make it impossible for us to really put down and accept a new life.
It takes time and courage to face up to these feelings and truly understand and deal with them.
Paying attention to life is also a manifestation of self-growth. By facing and dealing with our inner worries, we can learn more about ourselves and enhance our emotional handling ability.
For example, a person may be emotionally broken and can't let go. He may always recall the good old days, or he may feel angry and unwilling about the betrayal of the other party. However, if he keeps pestering like this, he can't start a new life and he can't be really happy.
He needs some ways, such as psychological counseling, talking to friends, self-reflection and so on. To get rid of this concern and liberate yourself. When he really does this, he will find himself more open and free, and cherish his present life more.