Thankfulness (both as a virtue and as an individual instance) reveal something about a worldview. Gratitude suggests that we know what we do and don't deserve ... that there's an "ought," and even a "something" to which this thanksgiving is owed. Deep down we know we ought to be thankful, and this reveals that we're hard-wired for recognizing who we are, in relation to the One who deserves our gratitude. As a result, people of faith ought to be the most thankful among all people and should model it for the onlooking world.