It is work work that one delights in that is the surest guarantor of happiness. But even here it is a work that has to be earned by labor in one's earlier years. One should labor so hard in youth that everything one does subsequently is easy by comparison.
I'm enamored with the art world. Anytime you look at anything that's considered artistic there's a commercial world around it: the ballet opera any kind of music. It can't exist without it.