Introit: John xxi. 15-17

    If thou lovest Me, Simon Peter, feed My lambs, feed My sheep. Ps. I will extol Thee, O Lord, for Thou hast upheld me; and hast not made my enemies to rejoice over me. ℣. Glory be. If thou lovest...

Collect

    O God, who didst bestow upon the soul of Thy servant Gregory the rewards of eternal happiness; mercifully grant, that we, who are oppressed by the weight of our sins, may be relieved through his intercession. Through our Lord.

Commemoration of the Feria:

Collect

    May the blessed solemnity of Thy saints Cosmas and Damian magnify Thee, O Lord: by which Thou hast both granted eternal glory to them, and assistance to us by Thy ineffable providence. Through our Lord.

Epistle: 1 Peter v. 1-4, 10-11

    Lesson from the First Epistle of St. Peter. Dearly beloved, the ancients that are among you I beseech, who am myself also an ancient and a witness of the sufferings of Christ; as also a partaker of that glory which is to be revealed in time to come: Feed the flock of God which is among you, taking care of it, not by constraint but willingly, according to God: not for filthy lucre's sake but voluntarily; neither as lording it over the clergy but being made a pattern of the flock from the heart. And when the prince of pastors shall appear, you shall receive a never fading crown of glory. But the God of all grace, who hath called us unto His eternal glory in Christ Jesus, after you have suffered a little, will Himself perfect you and confirm you and establish you. To Him be glory and empire for ever and ever. Amen.

Gradual: Psalms cvi. 32, 31

    Let them exalt him in church of the people: and praise him in the chair of the ancients. ℣. Let the mercies of the Lord give glory to Him and His wonderful works to the children of men.

Tract: Psalms xxxix. 10-11

    I have declared Thy justice in a great church. Lo, I will not restrain my lips. O Lord, Thou knowest it. ℣. I have not hid Thy justice within my heart: I have declared Thy truth and Thy salvation. ℣. I have not concealed Thy mercy and Thy truth from a great council.

Gospel: Matthew xvi. 13-19

    + Continuation of the Gospel of St. Matthew. At that time, Jesus came into the quarters of Caesarea Philippi, and He asked His disciples, saying: Whom do men say that the Son of man is? But they said: Some, John the Baptist, and other some Elias, and others Jeremias, or one of the prophets. Jesus saith to them: But whom do you say that I am? Simon Peter answered, and said: Thou art Christ, the Son of the living God. And Jesus answering, said to him: Blessed art thou, Simon Bar-Jona, because flesh and blood hath not revealed it to thee, but My Father who is in heaven: and I say to thee, that thou art Peter, and upon this rock I will build My church, and the gates of hell shall not prevail against it; and I will give to thee the keys of the kingdom of heaven; and whatsoever thou shalt bind upon earth, it shall be bound also in heaven; and whatsoever thou shalt loose on earth, it shall be loosed also in heaven.

Offertory: Jeremias i. 9-10

    Behold I have given My words in thy mouth; lo, I have set thee over the nations and over kingdoms, to root up and to pull down, and to build and to plant.

Secret

    Vouchsafe, O Lord, we beseech Thee, that through the intercession of blessed Gregory, this sacrifice may be profitable to us; by the offering of which Thou didst wash away the sins of the whole world. Through our Lord.

Commemoration of the Feria:

Secret

    In the precious death of Thy righteous ones, O Lord, we offer to Thee that sacrifice from which martyrdom received its very beginning. Through our Lord.

Communion: Matthew xvi. 18

    Thou art Peter, and upon this rock I will build My Church.

Postcommunion

    O God, who didst make the blessed pontiff Gregory equal in merits to Thy saints, grant in Thy mercy that we who keep his memory by his festival, may likewise imitate the example of his life. Through our Lord.

Commemoration of the Feria:

Postcommunion

    May this sacrament be unto us a sure pledge of salvation, since we implore it by the merits of Thy blessed martyrs Cosmas and Damian. Through our Lord.

Last Gospel of the Feria:

Gospel: Luke iv. 38-44

    + The continuation of the holy Gospel according to St. Luke. At that time Jesus rising up out of the synagogue, went into Simon's house. And Simon's wife's mother was taken with a great fever; and they besought Him for her. And standing over her, He commanded the fever: and it left her. And immediately rising, she ministered to them. And when the sun was down, all they that had any sick with divers diseases brought them to Him. But He, laying His hands on every one of them, healed them. And devils went out from many, crying out and saying: Thou art the Son of God: and rebuking them, He suffered them not to speak, for they knew that He was Christ. And when it was day, going out He went into a desert place: and the multitudes sought Him, and came unto Him: and they stayed Him that He should not depart from them. To whom He said: To other cities also I must preach the kingdom of God: for therefore am I sent. And He was preaching in the synagogues of Galilee.

+ Taken from St. Andrew Daily Missal, by Dom Gaspar Lefebvre, O.S.B., Imprimi Potest 11-18-1945 P. Joannes Delacroix, O.S.B., Imprimatur 11-22-1945 Joseph Van Der Meersch