Johann Wolfgang von Goethe, Edgar Alfred BOWRING (1853). “The Poems of Goethe, Translated in the Original Metres, with a Sketch of Goethe's Life. By E. A. Bowring”, p.79
Ralph Waldo Emerson, Robert Ernest Spiller, Alfred Riggs Ferguson, Wallace E. Williams, Joseph Slater (1987). “The Collected Works of Ralph Waldo Emerson: Representative men: seven lectures”, p.13, Harvard University Press
"Elizabeth Gilbert, ‘Eat, Pray, Love’ Author, On What It Takes To Get Inspired". Interview with Chantal Pierrat, www.huffingtonpost.com. August 11, 2013.
"Hope, Faith, and Love". Poem by Friedrich Schiller (circa 1786), as translated in "The Common School Journal", Volume IX, edited by Horace Mann (p. 38), 1847.