If the First Reading exalts God's fidelity to his promise, the Gospel, with the parable of the marriage feast, makes us reflect on the human response. Several of those first invited refused the invitation because they were attracted by different interests; others even disdained the king's invitation, provoking a punishment that afflicted not only them but also the entire city. However, the king was not discouraged and sent his servants out to seek other guests to fill his banquet hall. Thus the aspect of the refusal of those initially invited caused the invitation to be extended to all, with a special predilection for the poor and the disadvantaged. This is what occurred in the Paschal Mystery: the force of evil is defeated by the omnipotence of God's love. The Risen Lord can now invite everyone to the banquet of Paschal joy and he himself can provide the guests with a wedding garment, symbol of the free gift of sanctifying grace. 

However, the human being must reciprocate God's generosity by freely adhering to him. It is precisely this generous path that was taken by those who we are venerating today as Saints. In Baptism they received the wedding garment of divine grace, they kept it clean and purified it and made it radiant during their life through the Sacraments. They are now taking part in the wedding feast in Heaven. The banquet of the Eucharist is an anticipation of the final feast in Heaven, to which the Lord invites us every day and in which we must take part, clothed in the wedding garment of his grace. Should it happen that we soil or even tear this garment with sin, God's goodness does not reject or abandon us to our destiny but rather offers us, with the Sacrament of Reconciliation, the possibility of restoring the wedding garment to the pristine state required for the feast.

[Pope Benedict, homily for the canonisation of four Blessed, 12 October 2008]