If you wish to make a man your enemy, tell him simply, 'You are wrong.' This method works every time.
Henry C. LinkPsychologically I should say that a person becomes an adult at the point when he produces more than he consumes or earns more than he spends. This may be at the age of eighteen, twenty-five, or thirty-five. Some people remain unproductive and dependent children forever and therefore intellectually and emotionally immature.
Henry C. Link