The body has limitations, the mind does not. You have to be mentality ready to be physically prepared.
Your purpose in life should be to develop and become the kind of character and personality that earns respect, esteem and love from the important people in the world.
If you can think it, you can do it. Fight for your dreams. Continue to push forward, try and when you fail, get up and try again. life is about the journey and the determination to win.
Discipline. Any dream can be realized with self discipline.