From Dom Guéranger's The Liturgical Year.
CHRISTMAS begins to glimmer on the horizon. The last Sunday after Pentecost has given us the closing instructions of the moveable Cycle. Beginning with the twenty-seventh of this month, the present days belong in some years to the new Cycle, in others to the one which is ending.
The last Lesson from the Scripture of the Time[1] ends with the solemn declaration of the last of the Prophets, announcing the approach of a new era: From the rising of the sun even to the going down, my Name is great among the Gentiles, and in every place there is sacrifice, and there is offered to my Name a clean oblation! For my Name is great among the Gentiles, with the Lord of hosts.[2] And in to-day's Gospel we have St. John the Baptist echoing the words of Malachias, and joining the old and the new times together: Behold the Lamb of God! He points out to us the Messias close at hand.
Andrew, brother of Peter, and another of John's disciples, asked this Messias: Rabbi, where dwellest thou? Jesus answered: Come and see. And they went, continues the Evangelist, and saw where he abode, and they stayed with him that day.[3] Whereupon St. Augustine speaking in the name of the Church on this Vigil, says: “Let us build him a dwelling in our hearts, that he may come to us, and teach us, and live with us.”[4] Here is our Advent planned out for us.
Let us put that blessed season under the protection of the Apostle of the Cross, and also of the holy Martyr Saturninus, whom the Church has honoured on this day from time immemorial.
Prayer
Quaesumus omnipotens Deus: ut beatus Andreas Apostolus, cujus praevenimus festivitatem, tuum pro nobis festivitatem, tuum pro nobis imploret auxilium; ut a nostris reatibus absoluti, a cunctis etiam periculis eruamur. Per Dominum.
We beseech thee, O Almighty God, that the blessed Apostle Andrew, whose festival we anticipate, may implore thy help for us; that absolved from our sins, we may also be delivered from all dangers. Through our Lord.
Prayer
Deus, qui nos beati Sacturnini Martyris tui concedis natalitio perfrui: ejus nos tribue meritis adjuvari. Per Dominum.
O God, who grantest us to rejoice in the festival of blessed Saturninus thy Martyr, grant us to be assisted by his merits. Through our Lord.
[1] Saturday before the 1st Sunday in Advent.
[2] Malach. i. 11.
[3] Gospel of the Vigil.
[4] Homily on the Vigil. Aug. Tract. vii. in Johann.