Begin to be now what you will be hereafter.
Go for it now. The future is promised to no one.
Be thine own palace, or the world's thy jail.
Never complain and never explain.
The secret of getting ahead is getting started.
Expect problems and eat them for breakfast.
Well done is better than well said.
It's always too early to quit.
What you do today can improve all your tomorrows.
To be a good loser is to learn how to win.
There's obviously nothing wrong with selling your art - only an idiot with a trust fund would tell you otherwise. But it's confusing to know how far you should take it.