Kristin Hannah (2013). “Kristin Hannah's Coming Home 4-Book Bundle: On Mystic Lake, Summer Island, Distant Shores, Home Again”, p.609, Ballantine Books
The Importance of Being Earnest act 1 (1895). The same lines appear, as a dialogue between Lord Illingworth and Mrs. Allonby, in A Woman of No Importance, act 2 (1893).