Most of the greatest artists in any medium are not terribly good at explaining their own work, and I don't think that's a bad thing. Part of what makes it interesting is that mystery that even the artist couldn't explain in any other terms, and if he or she could translate the work into simple expository prose, then the work itself probably wouldn't be as rich.

Better to leave the explanations to the critics and the historians. That is what they can (sometimes) do well.