And now also when the heads of Churches, holy men and acceptable to God, enter your roof, then in them the Lord also enters, and do you think of yourself as receiving the Lord. And when you eat and drink the Lord’s Body [ed. note: “I am not worthy, Lord, that Thou shouldest come unto me; but as Thou didst vouchsafe to lodge in a den or stable of brute beasts, &c.” vid. Liturgy of St. John Chrys. also Bp. Andrew’s Devotions, and our Communion Service. “We are not worthy so much as to gather up the crumbs under Thy Table, &c.”], then the Lord enters under your roof, and you then should humble yourself, saying, “Lord, I am not worthy.” For where He enters unworthily, there He enters to the condemnation of him who receives Him.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).
Also cites: Hom. in div. 5