Determination

Don't listen to anyone who tells you that you can't do this or that. That's nonsense. Make up your mind, you'll never use crutches or a stick, then have a go at everything……never, never let them persuade you that things are too difficult or impossible.

Douglas Bader (1910 - 1982)
British aviator and social reformer.

Speaking to a 14-year-old boy who had had a leg amputated after a car crash.