I like this:
"It’s more that there are two different kinds of people involved in a job that has the same name. There are people who work in the arts because they want to make a lot of money, and there are people who are genuinely interested in art. They happen to be selling it, but they could have done something completely different in that field, like writing or curating."
-gallerists Monika Sprüth and Philomene Magers
From an interview in The Art Newspaper.