Introit: Psalms lxxvi.

    Thy lightnings enlightened the world: the earth shook and trembled. Ps. How lovely are Thy tabernacles, O Lord of Hosts! my soul longeth and fainteth for the courts of the Lord. ℣. Glory be to the Father.

Collect

    O God, who in the glorious Transfiguration of Thine only-begotten Son didst confirm the mysteries of the faith by the testimony of the fathers, and who by Thy voice from the shining cloud, didst in wondrous manner foreshow the perfect adoption of sons : make us, in Thy loving kindness. we beseech Thee, as co-heirs with Him who is the King of glory, and in that very glory call us in the end to share. Through the same our Lord.

Commemoration of St. Sixtus & Companions:

Collect

    O God, who grantest us to celebrate the heavenly birthdays of Thy holy martyrs Sixtus, Felicissimus and Agapitus, vouchsafe that we may enjoy their fellowship in everlasting bliss. Through our Lord.

Epistle: 2 Peter i. 16-19

    Lesson from the Epistle of blessed Peter. Dearly beloved: We have not followed cunningly-devised fables, when we made known to you the power and presence of our Lord Jesus Christ; but: having been made eyewitnesses of His majesty. For He received from God the Father honor and glory; this voice coming down to Him from the excellent glory: This is My beloved Son in whom I am well pleased, hear ye Him. And this voice we heard brought from heaven, when we were with Him in the holy mount. And we have the more firm prophetical word, whereunto you do well to attend, as to a light that shineth in a dark place, until the day dawn, and the day-star arise in your hearts.

Gradual: Psalms xliv. 3, 2

    Thou art beautiful above the sons of men: grace is poured abroad in Thy lips. ℣. My heart hath uttered a good word: I speak My works to the King.

Alleluia: Wisdom vii. 26

    Alleluia, alleluia. ℣. He is the brightness of eternal light, the unspotted mirror, and the image of His goodness. Alleluia.

Gospel: Matthew xvii. 1-9

    At that time Jesus taketh Peter and James, and John his brother, and bringeth them up into a high mountain apart: and He was transfigured before them. And his face did shine as the sun: and His garments became white as snow. And behold there appeared to them Moses and Elias talking with Him. And Peter answering, said to Jesus: Lord, it is good for us to be here: if Thou wilt, let us make here three tabernacles, one for Thee, and one for Moses, and one for Elias. And as he was yet speaking, behold a bright cloud overshadowed them. And lo, a voice out of the cloud, saying: This is My beloved Son, in whom I am well pleased: hear ye Him. And the disciples hearing, fell upon their face and were very much afraid. And Jesus came and touched them, and said to them: Arise, and fear not. And they lifting up their eyes saw no one, but only Jesus. And as they came down from the mountain, Jesus charged them, saying: Tell the vision to no man till the Son of Man be risen from the dead.

Offertory: Psalms cxi. 3

    Glory and wealth are in his house: and his justice remaineth for ever and ever, alleluia.

Secret

    Mindful of the glorious Transfiguration of Thine only-begotten Son, hallow, we beseech Thee, O Lord, the gifts we offer: and by the brightness of His glory, cleanse us from the stains of sin. Through the same our Lord.

Commemoration of St. Sixtus & Companions:

Secret

    We offer to Thee, O Lord, the gifts of our devotion, that they may be pleasing to Thee in honor of Thy saints, and be made salutary to us through Thy mercy. Through our Lord.

Communion: Matthew xvii. 9

    Tell the vision you have seen to no man, till the Son of man be risen from the dead.

Postcommunion

    Vouchsafe unto us, we beseech Thee, almighty God, by the intelligence of a pure mind to attain to the understanding of the most sacred mystery of the Transfiguration of Thy Son, which with solemn worship we venerate. Through the same our Lord.

Commemoration of St. Sixtus & Companions:

Postcommunion

    Grant us, we beseech Thee, O Lord, by the intercession of Thy holy martyrs Sixtus, Felicissimus and Agapitus, that what we take with our mouths we may receive with pure minds. 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