In this life you can do and be anything you want or do anything you please, but in my opinion the following things you can't change or do is the following: 1. You can't change time nor go back in time 2. You can not change your gender you were born as even if you become homosexual or change your body. Your still either born a man or a woman 3. You can not be like God.....All opinions and facts concerning these are welcome. I bet at least one time in everyone in this world will desire to turn back time or wished they hadn't done something! Isn't that awkward!