“Happiness tends to be individual; we measure it by asking, “Are you happy?” Joy tends to be self-transcending. Happiness is something you pursue; joy is something that rises up unexpectedly and sweeps over you. Happiness comes from accomplishments; joy comes from offering gifts. Happiness fades; we get used to the things that used to make us happy. Joy doesn’t fade. To live with joy is to live with wonder, gratitude, and hope. People who are on the second mountain have been transformed. They are deeply committed. The outpouring of love has become a steady force.” 

― David Brooks, The Second Mountain: The Quest for a Moral Life