Jesus's Famous Last Words

The Parable of the Sheep and Goats comes at the end of the fifth of Jesus's discourses recorded in the Gospel of Matthew. These words are the last that he speaks to a general audience in Israel. Knowing that these would be his last words to them, what does he say, and why? What do we today do with these words, since they weren't spoken to us? And what ultimately is he driving at that will inform us in our practice of our faith?