As far as I'm concerned a painting speaks for itself. Paintings are messages from the heart. No explanation is necessary. If you don't understand it, you just don't get it and it's not a message to you.
I have been painting for almost 60 years. That's longer than most people have been alive. I have education in art (maybe too much or maybe not enough depending on who you ask) and I have a BFA degree, but I think that the best education in painting is doing it and doing it with passion and enthusiasm and energy every day.