Hmmm.... that is so true! Some examples are powerful people like:
1) Steve Jobs, the founder of Apple who was adopted but he became the man who created new items that noone imagined before
2) Oprah Winfrey was "a victim of sexual abuse" when she was 14 (Wikipedia) and now she's one of the richest, most influential women in the world
3) Michael Jackson, Nicki Minaj, Eminem, and lots others all had troubled childhood but channeled their energy into music, some writing songs about their past.
4) Mother Teresa lived in a poor ridden country with dying people around her. She then started taking care of them, even if they were dying because she reckoned that ""Being unwanted, unloved, uncared for, forgotten by everybody, I think that is a much greater hunger, a much greater poverty than the person who has nothing to eat."
Now, did their difficulities prevent them from living?? No way, instead of being hopelessly sad in their unfortunate lives, they go on with more drive than most of us who have "easy" lives compared to them. They fight against all odds in reaching their dreams, whilst inspiring others. So if you have a hard life.... Don't despair! You could be the next person in the list of TIME 100 Most Influential People :D