Become mature is not the same as being old. Being old is absolute matter, but become mature is an option. Right now I'm not a kid but not yet a man. I realized that frequently I still act and think like a child. Selfish. Always want to win themselves. Irritable. Want everything instantly. Waste of money, etc. I would like to turn into more mature. In my way of think and act. I know it's not easy, but I'm going to start trying. I promise.