Heaven's Time Machine

A man dies and goes to heaven. In heaven, he finds a time machine. He uses the time machine to change his past. He prevents himself from struggling and being bullied in high school. As a side effect, he starts losing his talent. He soon realizes that the struggles are what made him stronger. He goes back into the time machine and this time instead of trying to make his life easier he makes it a little bit harder. The lesson has been learned.

We want to forget the past without repeating it. To stop repeating past mistakes, you must remember the pain.