The first principle from which stems the moral of about all people at all time; it is summarized in this precept: Love thy neighbour as thyself, and: do as you would be done by.
It's always the music first for me. But if the music isn't selling, there isn't gonna be no business. So you gotta make sure music is always the first priority.
It is not right for painters to think that painting is like prostitution, that 'first you do it for love, then you do it for others, and finally you do it for money.