Robert Emmons, perhaps the world’s leading scientific expert on gratitude, argues that gratitude has two key components, which he describes in a Greater Good essay, “Why Gratitude Is Good.” “First,” he writes, “it’s an affirmation of goodness. We affirm that there are good things in the world, gifts and benefits we’ve received.” In the second part of gratitude, he explains, “we recognize that the sources of this goodness are outside of ourselves. … We acknowledge…
