CIC 333 From the Incarnation to the Ascension, the life of the Word incarnate is surrounded by the adoration and service of angels. When God “brings the firstborn into the world, he says: ‘Let all God’s angels worship him.’”1 Their song of praise at the birth of Christ has not ceased resounding in the Church’s praise: “Glory to God in the highest!”2 They protect Jesus in his infancy, serve him in the desert, strengthen him in his agony in the garden, when he could have been saved by them from the hands of his enemies as Israel had been.3 Again, it is the angels who “evangelize” by proclaiming the Good News of Christ’s Incarnation and Resurrection.4 They will be present at Christ’s return, which they will announce, to serve at his judgement.5

CIC 538 The Gospels speak of a time of solitude for Jesus in the desert immediately after his baptism by John. Driven by the Spirit into the desert, Jesus remains there for forty days without eating; he lives among wild beasts, and angels minister to him.6 At the end of this time Satan tempts him three times, seeking to compromise his filial attitude toward God. Jesus rebuffs these attacks, which recapitulate the temptations of Adam in Paradise and of Israel in the desert, and the devil leaves him “until an opportune time”.7

CIC 541 “Now after John was arrested, Jesus came into Galilee, preaching the gospel of God, and saying: ‘The time is fulfilled, and the kingdom of God is at hand: repent, and believe in the gospel.’”8 “To carry out the will of the Father Christ inaugurated the kingdom of heaven on earth.”9 Now the Father’s will is “to raise up men to share in his own divine life”.10 He does this by gathering men around his Son Jesus Christ. This gathering is the Church, “on earth the seed and beginning of that kingdoms”.11

CIC 1423 It is called the sacrament of conversion because it makes sacramentally present Jesus’ call to conversion, the first step in returning to the Father12 from whom one has strayed by sin.
It is called the sacrament of Penance, since it consecrates the Christian sinner’s personal and ecclesial steps of conversion, penance, and satisfaction.

CIC 1427 Jesus calls to conversion. This call is an essential part of the proclamation of the kingdom: “The time is fulfilled, and the kingdom of God is at hand; repent, and believe in the gospel.”13 In the Church’s preaching this call is addressed first to those who do not yet know Christ and his Gospel. Also, Baptism is the principal place for the first and fundamental conversion. It is by faith in the Gospel and by Baptism14 that one renounces evil and gains salvation, that is, the forgiveness of all sins and the gift of new life.

CIC 2612 In Jesus “the Kingdom of God is at hand.”15 He calls his hearers to conversion and faith, but also to watchfulness. In prayer the disciple keeps watch, attentive to Him Who Is and Him Who Comes, in memory of his first coming in the lowliness of the flesh, and in the hope of his second coming in glory.16 In communion with their Master, the disciples’ prayer is a battle; only by keeping watch in prayer can one avoid falling into temptation.17

1 Heb 1:6.
2 Lk 2:14.
3 Cf. Mt 1:20; 2:13,19; 4:11; 26:53; Mk 1:13; Lk 22:43; 2 Macc 10:29-30; 11:8.
4 Cf. Lk 2:8-14; Mk 16:5-7.
5 Cf. Acts 1:10-11; Mt 13:41; 24:31; Lk 12:8-9. The angels in the life of the Church
6 Cf. Mk 1:12-13.
7 Lk 4:13.
8 Mk 1:14-15.
9 LG 3.
10 LG 2.
11 LG 5.
12 Cf. Mk 1:15; Lk 15:18.
13 Mk 1:15.
14 Cf. Acts 2:38.
15 Mk 1:15.
16 Cf. Mk 13; Lk 21:34-36.
17 Cf. Lk 22:40, 46.