Problems are not stop signs, they are guidelines.
If you think you can do it, you can.
To be a good loser is to learn how to win.
Leap, and the net will appear.
Well done is better than well said.
The dog that trots about finds a bone.
Be thine own palace, or the world's thy jail.
It's always too early to quit.
Go for it now. The future is promised to no one.
If you've got a talent, protect it.
But to me the bottom line is the more education you can give yourself, and the more preparation you can do, the less chance of failing.