Brother David Steindl-Rast, a Benedictine monk who has, like Archbishop Desmond Tutu, spent much of his life engaged in Christian-Buddhist dialogue, and who curates a wonderful website called www.gratefulness.org, has said, “It is not happiness that makes us grateful. It is gratefulness that makes us happy” (quoted in The Book of Joy, p. 242).
The Dalai Lama counsels: every day as you wake up, think, “I am fortunate to be alive. I have a precious human life. I am not going to waste it”.