... I do not conduct any classes nor try to give individual instruction, because I want to remain active in thé field as long as I can. I could start a school, I suppose, but I'd rather paint. When I'm ready to quit the field, then I hope to feel that I have earned my right to what time is left to work for the sheer pleasure of it. The fun will always be in the doing, and I'd much rather be a student always.
I've slowly come to believe this to be an apt aphorism, as harsh as it sounds:
Those who can, do; those who can’t, teach.
But I like how Loomis puts it. He states his own preference (of doing, over teaching), instead of admonishing those who cannot do.