This teaching emphasizes that acts of hospitality will bring forth abundant blessings: to those who show kindness, we extend our peace, and if they are burdened by the light dust of earthly offenses, they are liberated when they provide refuge for the steps of the apostolic messengers. It is noteworthy that the Gospel of Matthew advises the apostles to discern the households they visit, ensuring they do not shift their place of stay and thus disrupt the customs of hospitality. Such discernment, however, is not required of the host, for selecting guests would undermine the very essence of hospitality.
While the direct mandate concerning the noble practice of hospitality is commendable, its spiritual interpretation carries profound sacramental significance. When selecting a home, one seeks a deserving host. Does this not suggest a preference for the Church and Christ? What dwelling is more suitable for the apostles than the holy Church itself? And who surpasses all others? Is it not Christ, who humbly washes the feet of those He welcomes? He does not permit those who enter His abode to remain unclean. Despite their past transgressions, He graciously purifies them for everlasting life. He is the sole figure whom none should forsake or replace. He is the only one to whom we should direct our plea, saying, “Lord, to whom shall we go? You have the words of eternal life, and we have believed” (John 6:68-69). Consider Peter, the embodiment of heavenly precepts, who accepted hospitality and thus merited a share in divine sanctification.
Therefore, the foremost consideration is the faith of the Church: if Christ resides within it, it must certainly be the chosen one! However, if the individuals present are unbelievers or if a heretical teacher brings disgrace to the household, one should not associate with such heretics and must distance oneself from that gathering. One should shake the dust from one's feet to avoid allowing the spiritual feet to become sullied by the aridity of barren disbelief, akin to dry soil. The preacher of the Gospel must bear the physical shortcomings of the faithful and remove the weight of their futile actions from his own feet, treating them as dust, as it is stated, “Who is weak, and I am not weak?” (2 Corinthians 11:29). If there exists a community that denies the faith and lacks a foundation in apostolic teaching, it must be forsaken to prevent the spread of disbelief's contagion. The Apostle explicitly instructs: “After one admonition to a heretic, reject him” (Titus 3:10).