Be kind whenever possible. It is always possible.
If you've got a talent, protect it.
You never know what motivates you.
The secret of getting ahead is getting started.
Always desire to learn something useful.
Only the educated are free.
Things do not happen. Things are made to happen.
After a storm comes a calm.
What you do today can improve all your tomorrows.
Either you run the day or the day runs you.
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.