Who Exactly Are “the Least of These”?

Which interpretation of Matthew 25 is more likely to inspire us to love our neighbor, to do justice, to walk humbly (emphasis on “humbly”) with our God? The interpretation that draws a line between those who have the right answer to how to live a righteous life and those who don’t, and reassures us that we are only responsible for radically loving those who have the right answer, as we do? Or the interpretation that says that every time we turn our face away from someone in desperate need, we are turning away from God?