I've been reading a book by Brian Tracy called No Excuses. In it, he makes this amazing point:
Losers make excuses; winners make progress. Now, how can you tell if your favorite excuse is valid or not? It's simple. Look around and ask, "Is there anyone else who has my same excuse who is successful anyway?"
When you ask this question, if you are honest, you will have to admit that there are thousands and even millions of people who have had it far worse than you have who have gone on to do wonderful things with their lives. And what thousands and millions of others have done, you can do as well—if you try.