Things do not happen. Things are made to happen.
The dog that trots about finds a bone.
The most effective way to do it, is to do it.
The secret of getting ahead is getting started.
Either you run the day or the day runs you.
After a storm comes a calm.
Always desire to learn something useful.
If you think you can do it, you can.
I can, therefore I am.
If you can dream it, you can do it.
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.