Sometimes we choose to be good not because we are good people, but because the cost of doing evil is too high. We fear a loss of trust, a loss of reputation, a loss of emotional comfort. We need to live better in this group, so we must follow the default rules of this group. These are the choices that are best for you after repeated trade-offs. Man is one of good and evil, and angels or demons are often just a thought. Where human nature is lower, it is animal nature, and where it is higher, it is God. In this sense, not harming you to a lower place is not harming your family and destroying people. Maybe one day, when you discover that the best way to achieve selfishness is selflessness, the world will be complete.