It's always too early to quit.
If you think you can do it, you can.
Do not weep do not wax indignant. Understand.
To know oneself, one should assert oneself.
Go for it now. The future is promised to no one.
Things do not happen. Things are made to happen.
To be a good loser is to learn how to win.
Never complain and never explain.
After a storm comes a calm.
The dog that trots about finds a bone.
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.