What was the most heartfelt sentence you heard when you were a child?

I think the most heartfelt thing most people hear when they are young is how good their parents say other people's children are and how bad they are. Every time they hear such words, they always feel deeply frustrated and lost, and feel sorry for their parents' words for a long time. This kind of heartache even exceeds the harm that sticks bring to their bodies. Until now, many parents are still educating their children in this way. Every time their children make mistakes, they always talk about other people's children. I don't know that this will do great harm to the child's young mind, and it is irreversible.