Problems are not stop signs, they are guidelines.
If you've got a talent, protect it.
Quality is not an act, it is a habit.
The wise does at once what the fool does at last.
The dog that trots about finds a bone.
Go for it now. The future is promised to no one.
The secret of getting ahead is getting started.
Be gentle to all and stern with yourself.
Only the educated are free.
Leap, and the net will appear.
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.