What you do today can improve all your tomorrows.
Be thine own palace, or the world's thy jail.
Be gentle to all and stern with yourself.
Problems are not stop signs, they are guidelines.
To be a good loser is to learn how to win.
By failing to prepare, you are preparing to fail.
The wise does at once what the fool does at last.
Be kind whenever possible. It is always possible.
You never know what motivates you.
If you've got a talent, protect 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.