CIC 1216 “This bath is called enlightenment, because those who receive this [catechetical] instruction are enlightened in their understanding. ..”1 Having received in Baptism the Word, “the true light that enlightens every man,” the person baptized has been “enlightened,” he becomes a “son of light,” indeed, he becomes “light” himself:2
Baptism is God’s most beautiful and magnificent gift. .. We call it gift, grace, anointing, enlightenment, garment of immortality, bath of rebirth, seal, and most precious gift. It is called gift because it is conferred on those who bring nothing of their own; grace since it is given even to the guilty; Baptism because sin is buried in the water; anointing for it is priestly and royal as are those who are anointed; enlightenment because it radiates light; clothing since it veils our shame; bath because it washes; and seal as it is our guard and the sign of God’s Lordship.3

CIC 1454 The reception of this sacrament ought to be prepared for by an examination of conscience made in the light of the Word of God. The passages best suited to this can be found in the Ten Commandments, the moral catechesis of the Gospels and the apostolic letters, such as the Sermon on the Mount and the apostolic teachings.4

CIC 1695 “Justified in the name of the Lord Jesus Christ and in the Spirit of our God,”5 “sanctified. .. [and] called to be saints,”6 Christians have become the temple of the Holy Spirit.7 This “Spirit of the Son” teaches them to pray to the Father8 and, having become their life, prompts them to act so as to bear “the fruit of the Spirit”9 by charity in action. Healing the wounds of sin, the Holy Spirit renews us interiorly through a spiritual transformation.10 He enlightens and strengthens us to live as “children of light” through “all that is good and right and true.”11

CIC 2641 “[Address] one another in psalms and hymns and spiritual songs, singing and making melody to the Lord with all your heart.”12 Like the inspired writers of the New Testament, the first Christian communities read the Book of Psalms in a new way, singing in it the mystery of Christ. In the newness of the Spirit, they also composed hymns and canticles in the light of the unheard-of event that God accomplished in his Son: his Incarnation, his death which conquered death, his Resurrection, and Ascension to the right hand of the Father.13 Doxology, the praise of God, arises from this “marvelous work” of the whole economy of salvation.14

1 St. Justin, Apol. 1, 61, 12: PG 6, 421.
2 Jn 1:9; 1 Thess 5:5; Heb 10:32; Eph 5:8.
3 St. Gregory Of Nazianzus, Oratio 40, 3-4: PG 36, 361C.
4 Cf. Mt 5-7; Rom 12-15; 1 Cor 12-13; Gal 5; Eph 4-6; etc.
5 2 Cor 6:11.
6 1 Cor 1:2.
7 Cf. 1 Cor 6:19.
8 Cf. Gal 4:6.
9 Gal 5:22, 25.
10 Cf. Eph 4:23.
11 Eph 5:8, 9.
12 Eph 5:19; Col 3:16.
13 Cf. Phil 2:6-11; Col 1:15-20; Eph 5:14; 1 Tim 3:16; 6:15-16; 2 Tim 2:11-13.
14 Cf. Eph 1:3-14; Rom 16:25-27; Eph 3:20-21; Jude 24-25.