"[explaining the close connection between Gottlieb-Newman-Rothko:] They were friends. They all were protégées of w:Milton Avery's, the three of them. They all adored Milton Avery. Oh, I don't know if they adored him, but they revered him.. ..And Milton Avery was the big powerful mover in their lives. Of the three in terms of professionalism, Gottlieb was the most professional always. He never took unto himself this role of, "I have the key to the absolute," a term that Barney Newman was very fond of invoking. They knew each other all along. And if I'm not mistaken, all three of them were married to school teachers."
January 1, 1970
https://en.wikiquote.org/wiki/Adolph_Gottlieb