I do not believe in the creed professed by the Jewish Church, by the Roman Church, by the Greek Church, by the Turkish Church, by the Protestant Church, nor by any church that I know of. My own mind is my own church.
An amateur is someone who supports himself with outside jobs which enable him to paint. A professional is someone whose wife works to enable him to paint.
It's important to know where you've come from so that you can know where you're going. I probably chose my profession because I was seeking approval, adulation, admiration and affection.