Pope Benedict XVI's Address at the Meeting with a Group of Disadvantaged Young People of The Rehabilitation Community of The University Of Notre Dame in Sydney, w2.vatican.va. July 18, 2008.
Ralph Waldo Emerson, Robert Ernest Spiller, Alfred Riggs Ferguson, Joseph Slater, Jean Ferguson Carr (1971). “The Collected Works of Ralph Waldo Emerson: English traits”, p.128, Harvard University Press