108 At the heart of the new evangelization and of the new moral life which it proposes and awakens by its fruits of holiness and missionary zeal, there is the Spirit of Christ, the principle and strength of the fruitfulness of Holy Mother Church. As Pope Paul VI reminded us: "Evangelization will never be possible without the action of the Holy Spirit". The Spirit of Jesus, received by the humble and docile heart of the believer, brings about the flourishing of Christian moral life and the witness of holiness amid the great variety of vocations, gifts, responsibilities, conditions and life situations. As Novatian once pointed out, here expressing the authentic faith of the Church, it is the Holy Spirit "who confirmed the hearts and minds of the disciples, who revealed the mysteries of the Gospel, who shed upon them the light of things divine. Strengthened by his gift, they did not fear either prisons or chains for the name of the Lord; indeed they even trampled upon the powers and torments of the world, armed and strengthened by him, having in themselves the gifts which this same Spirit bestows and directs like jewels to the Church, the Bride of Christ. It is in fact he who raises up prophets in the Church, instructs teachers, guides tongues, works wonders and healings, accomplishes miracles, grants the discernment of spirits, assigns governance, inspires counsels, distributes and harmonizes every other charismatic gift. In this way he completes and perfects the Lord's Church everywhere and in all things". In the living context of this new evangelization, aimed at generating and nourishing "the faith which works through love" (cf. Gal 5:6), and in relation to the work of the Holy Spirit, we can now understand the proper place which continuing theological reflection about the moral life holds in the Church, the community of believers. We can likewise speak of the mission and the responsibility proper to moral theologians.
Source: Veritatis Splendor (Vatican.va)