Florence Nightingale, Michael D. Calabria, Janet A. Macrae (1994). “Suggestions for Thought by Florence Nightingale: Selections and Commentaries”, p.97, University of Pennsylvania Press
"Aphorisms on man. Translated from the original manuscript of the Rev. John Caspar Lavater, citizen of Zuric. ; [One line from Juvenal]" by Johann Kaspar Lavater, 1790.