You don't. The truth is many people get through their lives fairly happily without ever finding out what their true Life Purpose is. My father, Jack, is one example. He lived a full life he enjoyed until his health deteriorated. He died two months before his 95th birthday. A life that long would take at least a book to share but just so you can get an impression: From Herefordshire (UK) he went to southern Rhodesia with his 1st wife (he had 3) after serving in WWII, at a time