Russell would later recall in "My Mental Development" that "with a sense of escaping from prison, we allowed ourselves to think that grass is green, that the sun and stars would exist if no one was aware of them ..."—Russell B, (1944) "My Mental Development", in Schilpp, Paul Arthur: The Philosophy of Bertrand Russell, New York: Tudor, 1951, pp. 3–20.
Russell skev senere i "My Mental Development" at "with a sense of escaping from prison, we allowed ourselves to think that grass is green, that the sun and stars would exist if no one was aware of them ..."—Russell B, (1944) "My Mental Development", i Schilpp, Paul Arthur: The Philosophy of Bertrand Russell, New York: Tudor, 1951, pp 3–20.