Things do not happen. Things are made to happen.
Expect problems and eat them for breakfast.
After a storm comes a calm.
Be thine own palace, or the world's thy jail.
You never know what motivates you.
The dog that trots about finds a bone.
To be a good loser is to learn how to win.
Leap, and the net will appear.
It's always too early to quit.
If you think you can do it, you can.
The whole essence of good drawing - and of good thinking, perhaps - is to work a subject down to the simplest form possible and still have it believable for what it is meant to be.