M. E. P. Seligman, Flourish: A Visionary New Understanding of Happiness and Well-Being (New York: Free Press, 2011), 49; M. Seligman, “Active and Constructive Responding,” YouTube video, 4:01, posted by “RefLearn,” April 23, 2008, https://www.youtube.com /watch?v=MU3y2ApnG7Y.
