From Pope St. John Paul II’s encyclical Veritatis Splendor (1993):
In the heart of every Christian, in the inmost depths of each person, there is always an echo of the question which the young man in the Gospel once asked Jesus: “Teacher, what good must I do to have eternal life?” (Mt 19:16). Everyone, however, needs to address this question to the “Good Teacher”, since he is the only one who can answer in the fullness of truth, in all situations, in the most varied of circumstances. And when Christians ask him the question which rises from their conscience, the Lord replies in the words of the New Covenant which have been entrusted to his Church. As the Apostle Paul said of himself, we have been sent “to preach the Gospel, and not with eloquent wisdom, lest the Cross of Christ be emptied of its power” (1 Cor 1:17). The Church’s answer to man’s question contains the wisdom and power of Christ Crucified, the Truth which gives of itself.
When people ask the Church the questions raised by their consciences, when the faithful in the Church turn to their Bishops and Pastors, the Church’s reply contains the voice of Jesus Christ, the voice of the truth about good and evil. In the words spoken by the Church there resounds, in people’s inmost being, the voice of God who “alone is good” (cf. Mt 19:17), who alone “is love” (1 Jn 4:8, 16).
Through the anointing of the Spirit this gentle but challenging word becomes light and life for man. Again the Apostle Paul invites us to have confidence, because “our competence is from God, who has made us competent to be ministers of a new covenant, not in a written code but in the Spirit . . . The Lord is the Spirit, and where the Spirit of the Lord is, there is freedom. And all of us, with unveiled faces, reflecting the glory of the Lord, are being changed into his likeness from one degree of glory to another; for this comes from the Lord, the Spirit” (2 Cor 3:5-6, 17-18).
— Veritatis Splendor 117