Acceptance and tolerance and forgiveness those are life-altering lessons.
Age is a terrible avenger. The lessons of life give you so much to work with but by the time you've got all this great wisdom you don't get to be young anymore.
Life is a succession of lessons which must be lived to be understood.
My childhood should have taught me lessons for my own fatherhood but it didn't because parenting can only be learned by people who have no children.