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

    Eternal Shepherd, look graciously upon Thy flock, and through blessed Damasus Thy martyr and supreme Pontiff, whom Thou didst appoint Pastor of the universal Church, keep it under Thy continual protection. Through our Lord.

Commemoration of the Octave:

Collect

    O God who, by the Immaculate Conception of the Virgin, didst make her a worthy habitation for Thy Son, and didst, by His foreseen death, preserve her from all stain of sin; grant, we beseech Thee, that through her intercession we may be cleansed from sin and come with pure hearts to Thee. Through the same our Lord.

Commemoration of the Feria:

Collect

    Stir up our hearts, O Lord, to prepare the ways of Thine only-begotten Son; that through His coming we may attain to serve Thee with purified minds. Who with Thee liveth and reigneth.

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.

Alleluia: Matthew xvi. 18

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

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

    We beseech Thee, O Lord, having offered our gifts, benignly enlighten Thy Church, both that the success of Thy flock may everywhere progress, and under Thy guidance Thy pastors may be pleasing to Thy name. Through our Lord.

Commemoration of the Octave:

Secret

    Accept, O Lord, the saving host which we offer Thee on the solemn festival of the Immaculate Conception of the blessed Virgin Mary, and grant that, as we confess her to have been preserved by Thy prevenient grace from all stain of sin; so through her intercession may we be delivered from all our faults. Through our Lord.

Commemoration of the Feria:

Secret

    Be appeased, we beseech Thee, O Lord, by the prayers and offerings of our humility: and where we have no merits to plead for us, do Thou help us with Thine aid. Through our Lord.

Communion: Matthew xvi. 18

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

Postcommunion

    Be appeased, O Lord, we beseech Thee; that Thy Church, nourished with this holy refreshment, and guided by wise direction, may receive both a growth in freedom and continue steadfast in soundness of religion. Through our Lord.

Commemoration of the Octave:

Postcommunion

    May the sacrament which we have received, O Lord our God, repair in us the wounds of that sin, from which Thou didst in a singular manner preserve the Immaculate Conception of Blessed Mary. Through our Lord.

Commemoration of the Feria:

Postcommunion

    Filled with the food of this spiritual nourishment, we suppliantly entreat Thee, O Lord, that through our participation in this Mystery Thou wouldst teach us to despise earthly things and to love heavenly ones. Through our Lord.

+ 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