
Virgil Thompson, " On William Kapell http://www.williamkapell.com/articles/virgilthompson.html", New York Herald-Tribune (October, 1953).
About
"The Black Boy Looks at the White Boy" in Esquire (May 1961)
Variant: Nobody is more dangerous than he who imagines himself pure in heart; for his purity, by definition, is unassailable.
Source: Nobody Knows My Name
Virgil Thompson, " On William Kapell http://www.williamkapell.com/articles/virgilthompson.html", New York Herald-Tribune (October, 1953).
About
Source: Seven Great Statesmen in the Warfare of Humanity with Unreason (1915), p. 59
Source: The Limits of Evolution, and Other Essays, Illustrating the Metaphysical Theory of Personal Ideaalism (1905), The Harmony of Determinism and Freedom, p.324
"Speech to Danish working-class actors on the art of observation" [Rede an dänische Arbeiterschauspieler über die Kunst der Beobachtung] (1934), from The Messingkauf Poems, published in Versuche 14 (1955); trans. John Willett in Poems, 1913-1956, pp. 235-236
Poems, 1913-1956 (1976)
“The power of purity—it is a definite power.”
Pearls of Wisdom
"Partisan Review 'Art Chronicle': 1952" (1952), p. 146
1960s, Art and Culture: Critical Essays, (1961)
“Purity of heart is love for the weak who constantly fall.”
Source: Poustinia (1975), Ch. 12