109 The season of Lent has a twofold character: primarily by recalling or preparing for baptism and by penance, it disposes the faithful, who more diligently hear the word of God and devote themselves to prayer, to celebrate the paschal mystery. This twofold character is to be brought into greater prominence both in the liturgy and by liturgical catechesis. Hence: a) More use is to be made of the baptismal features proper to the Lenten liturgy; some of them, which used to flourish in bygone days, are to be restored as may seem good. b) The same is to apply to the penitential elements. As regards instruction it is important to impress on the minds of the faithful not only a social consequences of sin but also that essence of the virtue of penance which leads to the detestation of sin as an offence against God; the role of the Church in penitential practices is not to be passed over, and the people must be exhorted to pray for sinners.
Source: Sacrosanctum Concilium (Vatican.va)