Introit

    Let us all rejoice in the Lord, celebrating a festival-day in honor of blessed Thomas the martyr: at whose martyrdom the Angels rejoice, and praise the Son of God. Ps. Rejoice in the Lord, O ye just: praise becometh the upright. ℣. Glory be to the Father.

Collect

    O God, for whose Church the glorious Bishop Thomas fell by the swords of the wicked: grant, we beseech Thee, that all who implore his help may obtain a salutary answer to their petitions. Through our Lord.

Commemoration of the Octave:

Collect

    Grant, we beseech Thee, almighty God, that the new birth in the flesh of Thine only-begotten Son may set us free, whom the old bondage doth hold under the yoke of sin. Through the same our Lord.

Epistle: Hebrews v. 1-6

    Lesson from the Epistle of blessed Paul the Apostle to the Hebrews. Brethren: Every high priest taken from among men is ordained for men in the things that appertain to God: that he may offer up gifts, and sacrifices for sins: who can have compassion on them that are ignorant and that err: because he himself also is compassed with infirmity: and therefore he ought, as for the people so also for himself, to offer for sins. Neither doth any man take the honor to himself, but he that is called by God, as Aaron was. So Christ also did not glorify Himself that He might be made a high priest; but He that said unto Him: Thou art My Son, this day have I begotten Thee. As He saith also in another place: Thou art a priest for ever, according to the order of Melchisedech.

Gradual: Ecclesiasticus xliv. 16, 20

    Behold a great priest, who in his days pleased God. ℣. There was not found the like to him, who kept the law of the Most High.

Alleluia: John x. 14

    Alleluia, alleluia. ℣. I am the Good Shepherd: and I know My sheep, and Mine know Me. Alleluia.

Gospel: John x. 11-16

    + The continuation of the holy Gospel according to St. John. At that time Jesus said to the Pharisees: I am the Good Shepherd. The Good Shepherd giveth His life for His sheep. But the hireling, and he that is not the shepherd, whose own the sheep are not, seeth the wolf coming, and leaveth the sheep, and flieth: and the wolf catcheth and scattereth the sheep: and the hireling flieth, because he is a hireling and he hath no care for the sheep. I am the Good Shepherd: and I know Mine, and Mine know Me. As the Father knoweth Me, and I know the Father and I lay down My life for My sheep. And other sheep I have that are not of this fold: them also I must bring, and they shall hear My voice, and there shall be one fold and one shepherd.

Offertory: Psalms xx. 4-5

    Thou hast set, O Lord, on his head a crown of precious stones: he asked life of Thee, and Thou hast given it to him. Alleluia.

Secret

    Do Thou, O Lord, sanctify the gifts dedicated to Thee: and appeased by the intercession of blessed Thomas Thy martyr and bishop, look down mercifully upon us. Through our Lord.

Commemoration of the Octave:

Secret

    The gifts we offer, do Thou, O Lord, sanctify by the new birth of Thine only-begotten Son: and cleanse us from the stains of our sins. Through the same.

Communion: John x. 14

    I am the Good Shepherd : and I know My sheep, and Mine know Me.

Postcommunion

    May this communion, O Lord, cleanse us from guilt: and by the intercession of blessed Thomas Thy Martyr and Bishop may it make us partakers of Thine heavenly remedy. Through our Lord.

Commemoration of the Octave:

Postcommunion

    Grant, we beseech Thee, almighty God, that as the Savior of the world born on this day is the author of our divine generation, so He may Himself also be to us the giver of immortality. Who with Thee liveth.

+ 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