I create pottery and I never sell it. So I can't evaluate my art by the level of profit. I sometimes sit in the dead of night, listening to music, and suddenly

I create pottery and I never sell it. So I can't evaluate my art by the level of profit. I sometimes sit in the dead of night, listening to music, and suddenly I catch a glimpse of a piece of work and see it in the gentle light showing perfect curves that I don't see in any other work out there. In that moment I feel that I can die having created it, and at that moment I am sure that my art is good. (Provided you must have seen enough professional works and criticism in the field.)