It is necessary to have enough life experience to help a person have the ability to think independently and truly have his own thoughts and concepts.
Being young means that most of the things in your brain are other people’s ideas and most of them are other people’s thoughts. Therefore, most of the time, young people just either suffer from other people’s ideas or take delight in other people’s thoughts.
The stupidest thing in a person’s life is that they never compare their own ideas with their own experiences. They don’t know how far their thoughts and ideas are from their true self.
This is what people often call introspection.