The Roman Missal: Proper of Saints, August (English) 6

1[August 6. Transfiguration of our Lord Jesus Christ.—Greater Double.]
2Introit. Ps. lxxv. 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, &c.
3Prayer. Deus qui fidei. O God, who didst confirm the mysteries of faith by the testimony of the fathers in the glorious transfiguration of thy only begotten Son, and didst admirably foreshew the perfect adoption of sons, by a voice coming down in a bright cloud; mercifully grant that we may be made co-heirs of the same King of glory, and give us to be partakers of his glory. Through the same Lord, &c.
4[Commemoration of SS. Xystus, Felicissimus, and Agapitus, Martyrs, by the Prayer, Deus qui nos concedis, in the Mass Intret, for many Martyrs, page XVIII.]
5Epistle. 2 Peter i. 16—19. 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 eye-witnesses of his majesty. For he received from God the Father honour 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.
6Gradual. 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, alleluia.—He is the brightness of eternal light, the unspotted mirror, and the image of his goodness. Alleluia.
7[Gospel. St Matthew xvii. 1—9. Jesus took Peter, &c. as on the Second Sunday in Lent, page 153.]
8Offertory. Glory and wealth are in his house: and his justice remaineth for ever and ever. Alleluia.
9Secret. Sanctify our offerings, we beseech thee, O Lord, by the glorious transfiguration of thy only-begotten Son; and purify us from the defilements of sin, by the brightness of his light. Through the same Lord, &c.
10[Secret of SS. Xystus, &c. as directed above.]
11[Preface of the Nativity of our Lord, as in the Ordinary of the Mass, page 15.]
12Communion. Tell the vision you have seen to no man, till the Son of man be risen from the dead.
13Postcom. Præsta quæsumus. Grant, we beseech thee, Almighty God, that we may attain, by the intelligence of a pure mind, the most holy mystery of the transfiguration of thy Son, which we celebrate with solemn office. Through the same Lord, &c.
14[Postcommunions of SS. Xystus, &c. as above.]