Mentally Developed people are pretty intelligent. They don't care much what other people think about them. They are social geniuses. They handle every situation very intelligently. People respect them.

These signs include all the psychological traits of mentally developed people. And the social habits of them how they behave when dealing with people. Here on the art of happiness, I'll keep making stuff like that. Most of content on the art of happiness is about self help and personality building.