Introit: Isaias lxi. 10

    I will greatly rejoice in the Lord, and my soul shall be joyful in my God: for He hath clothed me with the garments of salvation, and with the robe of justice He hath covered me, as a bride adorned with her jewels. Ps. I will extol Thee, O Lord, for Thou hast upheld me: and hast not made my enemies to rejoice over me. ℣. Glory be.

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: Proverbs viii. 22-35

    Lesson from the book of Proverbs. The Lord possessed me in the beginning of His ways, before He made anything, from the beginning. I was set up from eternity, and of old, before the earth was made. The depths were not as yet, and I was already conceived; neither had the fountains of waters as yet sprung out; the mountains with their huge bulk had not as yet been established: before the hills I was brought forth; He had not yet made the earth, nor the rivers, nor the poles of the world. When He prepared the heavens, I was there, when with a certain law and compass He enclosed the depths; when He established the sky above, and poised the fountains of waters; when He compassed the sea with its bounds, and set a law to the waters that they should not pass their limits; when He balanced the foundations of the earth; I was with Him, forming all things, and was delighted every day, playing before Him at all times, playing in the world: and my delight is to be with the children of men. Now therefore, ye children, hear me: blessed are they that keep my ways. Hear instruction, and be wise, and refuse it not. Blessed is the man that heareth me, and that watcheth daily at my gates, and waiteth at the posts of my doors. He that shall find me shall find life, and shall have salvation from the Lord.

Gradual: Judith xiii. 23; xv. 10

    Blessed art thou, O Virgin Mary, by the Lord the most high God above all women upon earth. ℣. Thou art the glory of Jerusalem, thou art the joy of Israel, thou art the honor of our people.

Alleluia: Ecclesiasticus iv. 7

    Alleluia, alleluia. ℣. Thou art all fair, O Mary, and there is in thee no stain of original sin. Alleluia.

Gospel: Luke i. 26-28

    + The continuation of the holy Gospel according to St. Luke. The Angel Gabriel was sent from God into a city of Galilee, called Nazareth, to a virgin espoused to a man whose name was Joseph, of the house of David; and the virgin's name was Mary. And the Angel being come in, said unto her: Hail, full of grace, the Lord is with thee: blessed art thou among women.

Offertory: Luke i. 28

    Hail Mary, full of grace; the Lord is with thee; blessed art thou among women.

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

    Glorious things are said of thee, O Mary, for He who is mighty hath done great things unto thee.

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