“I have nothing to teach you that will help you to make a living. [as art teacher, advising his students]”
— In: Loughery, John. John Sloan: Painter and Rebel. New York: Henry Holt, 1995. , pp. 224-225
“[on w:Diego Rivera:] ..the one artist on this continent who is in the class of the old masters.”
— In: Brooks, Van Wyck. John Sloan: a Painter's Life. New York: E.P. Dutton & Co, 1955, p. 170
“[As a painting teacher] I'm not flirting, playing around. I'm serious about it.. .If you don't want to be serious about playing [at art], do something of no account. Go into banking. Buy collar buttons at five cents a dozen and sell them for five cents a piece.”
— Ibid. p. 8.
“It takes a great deal of strong personality to survive the art school training. Hard nuts that the art schools can't crack and devour get through and become artists.”
— Ibid., p. 8.
“Then there is this idea that the world owes you a living. Here is a little thought about that. It isn't particularly logical but it makes my point. You were paid when you were born, with the privilege of living. Death is all that is coming to you. Life came to you when you were born.”
— Ibid., p. 27.
“[choosing his scenes by:] ..night vigils at the back window.”
— The Gist of Art Joan Sloan, New York: Artist Group, 1939, p. 220

Quotes via Wikiquote (CC BY-SA), each with its original source.