First Reading — Isaiah 49:3, 5-6
Athanasius of Alexandria
On 49:5
In respect of nature, [Christ] differs in nothing from us, though he precedes us in time, so long as we all consist and are created by the same hand.
Responsorial Psalm — Psalm 40:2, 4, 7-8, 8-9, 10
Hilary of Poitiers
On 39:6
[Christ] offered himself to the death of the accursed that he might break the curse of the Law, offering himself voluntarily a victim to God the Father, in order that by means of a voluntary victim the curse that attended the discontinuance of the regular victim might be removed. Now of this sacrifice mention is made in another passage of the psalms: "Sacrifice and offering you did not desire, but a body have you prepared for me"; that is, by offering to God the Father, who refused the legal sacrifices, the acceptable offering of the body that he received. Of this offering the holy apostle thus speaks: "For this he did once for all when he offered himself up," securing complete salvation for the human race by the offering of this holy, perfect victim.
Second Reading — 1 Corinthians 1:1-3
Tertullian
On 1:3
My preliminary remarks on the preceding epistle called me away from treating of its superscription, for I was sure that another opportunity would occur for considering the matter, it being of constant recurrence, and in the same form too, in every epistle. The point, then, is, that it is not (the usual) health which the apostle prescribes for those to whom he writes, but "grace and peace." I do not ask, indeed, what a destroyer of Judaism has to do with a formula which the Jews still use. For to this day they salute each other with the greeting of "peace," and formerly in their Scriptures they did the same. But I understand him by his practice plainly enough to have corroborated the declaration of the Creator: "How beautiful are the feet of them that bring glad tidings of good, who preach the gospel of peace!" For the herald of good, that is, of God's "grace" was well aware that along with it "peace" also was to be proclaimed. Now, when he announces these blessings as "from God the Father and the Lord Jesus," he uses titles that are common to both, and which are also adapted to the mystery of our faith; and I suppose it to be impossible accurately to determine what God is declared to be the Father and the Lord Jesus, unless (we consider) which of their accruing attributes are more suited to them severally. First, then, I assert that none other than the Creator and Sustainer of both man and the universe can be acknowledged as Father and Lord; next, that to the Father also the title of Lord accrues by reason of His power, and that the Son too receives the same through the Father; then that "grace and peace" are not only His who had them published, but His likewise to whom offence had been given. For neither does grace exist, except after offence; nor peace, except after war. Now, both the people (of Israel) by their transgression of His laws, and the whole race of mankind by their neglect of natural duty, had both sinned and rebelled against the Creator.
Gospel — John 1:29-34
Origen
On 1:29
(tom. vi. c. 30) After this testimony, Jesus is seen coming to John, not only persevering in his confession, but also advanced in goodness: as is intimated by the second day. Wherefore it is said, The next day John seeth Jesus coming to him. Long before this, the Mother of Jesus, as soon as she had conceived Him, went to see the mother of John then pregnant; and as soon as the sound of Mary’s salutation reached the ears of Elisabeth, John leaped in the womb: but now the Baptist himself after his testimony seeth Jesus coming. Men are first prepared by hearing from others, and then see with their own eyes. The example of Mary going to see Elisabeth her inferior, and the Son of God going to see the Baptist, should teach us modesty and fervent charity to our inferiors. What place the Saviour came from when He came to the Baptist we are not told here; but we find it in Matthew, Then cometh Jesus from Galilee to Jordan unto John to be baptized of him. (Matt. 3:13)
On 1:29
(tom. vi. c. 32. et seq.) But whereas five kinds of animals are offered in the temple, three beasts of the field, a calf, a sheep, and a goat; and two fowls of the air, a turtle dove and a pigeon; and of the sheep kind three are introduced, the ram, the ewe, the lamb; of these three he mentions only the lamb; the lamb, as we know, being offered in the daily sacrifice, one in the morning, and one in the evening. But what other daily offering can there be, that can be meant to be offered by a reasonable nature, except the perfect Word, typically called the Lamb? This sacrifice, which is offered up as soon as the soul begins to be enlightened, shall be accounted as a morning sacrifice, referring to the frequent exercise of the mind in divine things; for the soul cannot continually apply to the highest objects because of its union with an earthly and gross body. By this Word too, Which is Christ the Lamb, we shall be able to reason on many things, and shall in a manner attain to Him in the evening, while engaged with things of the bodyt. But He Who offered the lamb for a sacrifice, was God hid in human form, the great Priest, He who saith below, No man taketh it (My life) from Me, but I lay it down of Myself: (John 10:18) whence this name, the Lamb of God: for He carrying our sorrows, (Isaiah 53:4. 1 Pet. 2:24.) and taking away the sins of the whole world, hath undergone death, as it were baptism. (Luke 12:50.) For God suffers no fault to pass uncorrected; but punishes it by the sharpest discipline.
On 1:29
(tom. vi. c. 36) As there was a connexion between the other sacrifices of the law, and the daily sacrifice of the lamb, in the same way the sacrifice of this Lamb has its reflexion in the pouring out of the blood of the Martyrs, by whose patience, confession, and zeal for goodness, the machinations of the ungodly are frustrated.