6. The renewal of the Church is also achieved through the witness offered by the lives of believers: by their very existence in the world, Christians are called to radiate the word of truth that the Lord Jesus has left us. The Council itself, in the Dogmatic Constitution Lumen Gentium, said this: While “Christ, ‘holy, innocent and undefiled’ (Heb 7:26) knew nothing of sin (cf. 2 Cor 5:21), but came only to expiate the sins of the people (cf. Heb 2:17)... the Church ... clasping sinners to its bosom, at once holy and always in need of purification, follows constantly the path of penance and renewal. The Church, ‘like a stranger in a foreign land, presses forward amid the persecutions of the world and the consolations of God’, announcing the cross and death of the Lord until he comes (cf. 1 Cor 11:26). But by the power of the risen Lord it is given strength to overcome, in patience and in love, its sorrow and its difficulties, both those that are from within and those that are from without, so that it may reveal in the world, faithfully, although with shadows, the mystery of its Lord until, in the end, it shall be manifested in full light.”[11]
The Year of Faith, from this perspective, is a summons to an authentic and renewed conversion to the Lord, the one Saviour of the world. In the mystery of his death and resurrection, God has revealed in its fullness the Love that saves and calls us to conversion of life through the forgiveness of sins (cf. Acts 5:31). For Saint Paul, this Love ushers us into a new life: “We were buried ... with him by baptism into death, so that as Christ was raised from the dead by the glory of the Father, we too might walk in newness of life” (Rom 6:4). Through faith, this new life shapes the whole of human existence according to the radical new reality of the resurrection. To the extent that he freely cooperates, man’s thoughts and affections, mentality and conduct are slowly purified and transformed, on a journey that is never completely finished in this life. “Faith working through love” (Gal 5:6) becomes a new criterion of understanding and action that changes the whole of man’s life (cf. Rom 12:2; Col 3:9-10; Eph 4:20-29; 2 Cor 5:17).