I can, therefore I am.
Leap, and the net will appear.
Problems are not stop signs, they are guidelines.
To be a good loser is to learn how to win.
It's always too early to quit.
Begin to be now what you will be hereafter.
Be gentle to all and stern with yourself.
Things do not happen. Things are made to happen.
By failing to prepare, you are preparing to fail.
If you've got a talent, protect it.
Don't take too much comfort in the fact that you're successful today because tomorrow could bring failure. There's no surety in life.