It turns out that while we realize that we are different than we were in the past, we expect that will will remain largely unchanged in the future. Daniel T. Gilbert, a psychologist at Harvard University calls it the "end of history illusion." So look back and think of all the mistakes you now think you made and how you would not have done those things knowing what you know now, like dating the wrong person, or having poor habits, or not saving enough money. According to these experts, that is exactly what you will feel 10, 20 or 50 years from now.
My Life In Bits And Pieces in Massachusetts.