zero-teens = you learn about the world.
early-teens = you intend to change the world when you grow up.
late-teens = you realise you can't change the world, ever.
early-twenties = you intend to direct your own life as you want it.
early-thirties = you realise you dont control your life, rather it controls you.
late-thirties = you vow to direct the life of your children.
early-fifties = you realise you can't control your children's life at all.
sixties and later = you give up all hope and continue living.
ofcourse, I am just guessing, but I feel its true :D.
3 hours ago