The '18-40-60 Rule': at 18 you care what everyone thinks, at 40 you don't care what anyone thinks and at 60 you realize no one ever cared about what you thought, they were busy worrying about themselves.
Daniel AmenThe Seeker, The Search, The Sacred by Guy Finley is a very wise book, filled with inspiration to help you dramatically improve your life. I highly recommend it.
Daniel Amen