Be gentle to all and stern with yourself.
If you're going through hell, keep going.
Well done is better than well said.
Never complain and never explain.
The wise does at once what the fool does at last.
Either you run the day or the day runs you.
If you can dream it, you can do it.
Be thine own palace, or the world's thy jail.
Problems are not stop signs, they are guidelines.
By failing to prepare, you are preparing to fail.
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.