Dominica II Adventus: "Art thou he that art to come?"

Introitus
Is 30:30
Pópulus Sion, ecce, Dóminus véniet ad salvándas gentes: et audítam fáciet Dóminus glóriam vocis suæ in lætítia cordis vestri.
Ps 79:2
Qui regis Israël, inténde: qui dedúcis, velut ovem, Joseph.
V. Glória Patri, ...

Collect
V. The Lord be with you.
R. And with thy spirit.
Let us pray.
Stir up our hearts, O Lord, to prepare the ways of Your only-begotten Son, so that through His coming we may be able to serve You with purified minds.
Who livest and reignest with God the Father, in the unity of the Holy Spirit, God, world without end.
R. Amen

Let us pray.
For the Vigil of Immaculata Conception
O God, who in her conception, didst wonderfully preserve the mother of thy only begotten Son from the stain of the original Sin, grant we pray, that thou make us so to be strengthened by her intercession as with pure hearts to take in her festival.
Commemoration St. Ambrose, Bishop, Confessor and Doctor of the Church
O God, who didst give blessed Ambrose to be thy people’s minister in eternal salvation; grant, we pray, that we who have him for teacher of life here on earth, may also deserve now that he is in heaven, to have him for an advocate.
Through Jesus Christ, thy Son our Lord, Who liveth and reigneth with thee, in the unity of the Holy Ghost, God, world without end.
R. Amen.

From the Holy Gospel according to Matthew
Matt 11:2-10
In that time, when John had heard in prison the works of Christ: sending two of his disciples he said to him: Art thou he that art to come, or look we for another? And so on.

Homily by Pope St. Gregory the Great.
6th Homily on the Gospels
The sight of so many signs and so many mighty works should have been a source of wonder, and not a stumbling-block. And yet the unfaithful Jer. xxxi. 5. found these very works a rock of offence, when they afterwards saw Him Who had worked so many miracles dying on the Cross. Hence Paul saith: "We preach Christ crucified, unto the Jews a stumbling-block and unto the Gentiles foolishness." 1 Cor. i. 23. It is indeed folly in the eyes of men to say that the Author of life died for men and thus men put as a stumbling-block to hinder them from coming to Jesus, the very thing that doth oblige them the most unto Him. For the more humbling God hath undergone for man's sake, the more worthy is He that man should worship Him.

Post Communion
P. The Lord be with you.
S. And with thy spirit.
Let us pray.
We who have been refreshed by the food of spiritual nourishment, humbly beseech You, O Lord, that through partaking of this sacrament You will teach us to disdain the things of earth and love those of heaven.
Through Jesus Christ, thy Son our Lord, Who liveth and reigneth with thee, in the unity of the Holy Ghost, God, world without end.
R. Amen.

Let us pray.
For the Vigil of Immaculata Conception
Grant protection to our weakness, O merciful God: that we, who are preparing for the festival of the Immaculate Conception of the Mother of thy only-begotten Son, may by the help of her prayers rise up from our iniquities.
Commemoration St. Ambrose, Bishop, Confessor and Doctor of the Church
Almighty God, we who receive the sacrament of our salvation, beseech You that the prayer of blessed Ambrose, Your Bishop and Confessor, in whose honor we have offered this sacrifice to Your majesty, may everywhere help us.
Through Jesus Christ, thy Son our Lord, Who liveth and reigneth with thee, in the unity of the Holy Ghost, God, world wi