Jesus concludes a set of parables with a direct revelation about the Last Judgement.
It is important to note that this separation takes place at the last judgement, after Jesus is revealed in his majesty. For until then, God forebears the evil in the world and does not cut it away, since "As I live says the Lord God, I swear I take no pleasure in the death of the wicked man, but rather in the wicked man's conversion, that he may live" (Ez 33:11). He patiently waits for us to turn back to Him and the way of life He proposes.
What does Christ mean when he says, "whatever you did for one of these least brothers of mine, you did for me"? Scholars disagree, but some say he indicates the missionaries who suffered on account of Christ. So our eternal salvation would depend on how we treat those who bring us God's message, on how we treat the Church, Christ's body. This makes sense, as they are the ones through whom Christ offers salvation, i.e. Himself as the Way to eternal life. We are to accept Christ's ministers, even when they ask us to change our ways or give up our own will. This can be accomplished in an effective way through spiritual direction, but it can also take place among a community of believers where each is a herald of Christ.
But we may also take Christ to be identifying with every poor and suffering man and woman. Mother Theresa said that on the streets she met "Christ in pitiable disguise." Others are less conscious that they are serving Christ directly, but they still do. The sheep of the passage were astonished that they had served Christ. This astonishment points to the fact that Christ is involved in our everyday actions, in the mundane, where we least expect him. He is especially in the personal. Let us look on our neighbor with the love with which Christ loves us, stretching out our arms to embrace all of humanity. Let us serve our neighbor humbly and diligently, for in serving him or her we serve Christ. We can be like the Archbishop Fulton J. Sheen, "servant of all."
Lord, convert our hearts before it is too late. Teach us to accept your ministers with the full strength of our mind and body. Lead us to find and embrace You in our neighbor who carries Your image, as Elizabeth embraced Mary who carried You. Keep us faithful to love.
Mary, gate of heaven, give us your heart to say yes to the plan of God as it is told us by God's herald. Watch over our priests and missionaries and give them the wisdom necessary for shepherding hearts. Be with us as we strive to live the works of mercy.