Remark made during a week at Princeton beginning 9 May 1921, later carved above the fireplace of the Common Room of Fine Hall (the Mathematical Institute), Princeton University - in R. W. Clark Einstein (1973) ch. 14
"A New Model of the Universe: Principles of the Psychological Method in Its Application to Problems of Science, Religion and Art". Book by P.D. Ouspensky, 1931.
"'You have naked bodies and genitalia, don't you? Why are you so adolescent?': Director Peter Greenaway on 'Puritan' Americans and the intense sex scenes in 'Eisenstein in Guanajuato'". Interview with Gary M. Kramer, www.salon.com. February 4, 2016.