“John Maynard Keynes, "Newton the Man," in The Royal Society Newton Tercentenary Celebrations, 15-19 July 1946 (Cambridge: at the University Press, 1947), pp. 27-34; also in an address to the Royal Society Club (1942), as quoted in A Dictionary of Scientific Quotations (1977) by Alan L. MacKay, p. 140”

Source: Wikiquote