Emmet Fox (1938). “The Sermon on the Mount: a general introduction to scientific Christianity in the form of a spiritual key to Matthew V, VI, and VII”
Henry David Thoreau, Jeffrey S. Cramer (2007). “I to Myself: An Annotated Selection from the Journal of Henry D. Thoreau”, p.395, Yale University Press
Leo Tolstoy (2016). “WHAT IS ART? & WHEREIN IS TRUTH IN ART? (Meditations on Aesthetics & Literature): On the Significance of Science and Art, Shakespeare and the Drama, The Works of Guy De Maupassant, A. Stockham'sTokology, Amiel's Diary, S. T. Seménov's Peasant Stories, Stop and Think!...”, p.351, e-artnow
Albert Einstein (2015). “Bite-Size Einstein: Quotations on Just About Everything from the Greatest Mind of the Twentieth Century”, p.24, St. Martin's Press
Henry David Thoreau, Jeffrey S. Cramer (2007). “I to Myself: An Annotated Selection from the Journal of Henry D. Thoreau”, p.395, Yale University Press