In the Gospel Jesus speaks to us of the answer that is given to the invitation of God — represented by a king — to take part in this marriage feast (cf. Mt 22:1-14). Many guests were invited but something unexpected happens: they refuse to take part in the celebration, they have other things to do; indeed, some of them show contempt for the invitation. God is generous to us, he offers us his friendship, his gifts, his joy, but often we do not welcome his words, we show greater interest in other things and put our own material concerns, our own interests, first. The king’s invitation even meets with hostile and aggressive reactions. Yet this does not impede his generosity. He is not discouraged and sends his servants out to invite many other people. The refusal of those invited first causes the invitation to be extended to everyone, even the poorest, the abandoned and disinherited. The servants gather together those they find and the wedding hall is filled: the king’s goodness knows no bounds and all are given the possibility of answering his call. However, there was one condition in order to attend this wedding feast: that the wedding garment be worn. And, on entering the hall, the king notices that someone has not wished to wear it and for this reason bars him from the banquet.
I would like to reflect for a moment on this point with a question: why did this man accept the king’s invitation, enter the banquet hall, find the door opened to him but not put on the wedding garment? What is this wedding garment? At the Mass of the Lord’s Supper, in Coena Domini, this year I mentioned a beautiful commentary on this parable by St Gregory the Great. He explains that the guest had accepted God’s invitation to take part in his banquet, that in a certain way he had faith which opened the door of the banquet hall to him, but he lacked something essential: the wedding garment, which is charity or love. And St Gregory adds: “Therefore each one of you in the Church who has faith in God has already taken part in the wedding feast, but cannot claim to wear the wedding garment unless he jealously guards the grace of love” (Homily 38, 9; PL 76, 1287). And this garment is woven symbolically on two looms of wood, one above and one below: love of God and love of neighbour (cf. ibid., 10: PL 76, 1288). We are all invited to be the Lord’s guests, to enter his banquet with faith, but we must put on and take care of the wedding garment: charity, to live in the profound love of God and neighbour.
[Pope Benedict, homily in Lamezia Terme 9 October 2011]