From Pope St. John Paul II’s encyclical Veritatis Splendor (1993):
As the Second Vatican Council reminds us, responsibility for the faith and the life of faith of the People of God is particularly incumbent upon the Church’s Pastors: “Among the principal tasks of Bishops the preaching of the Gospel is pre-eminent. For the Bishops are the heralds of the faith who bring new disciples to Christ. They are authentic teachers, that is, teachers endowed with the authority of Christ, who preach to the people entrusted to them the faith to be believed and put into practice; they illustrate this faith in the light of the Holy Spirit, drawing out of the treasury of Revelation things old and new (cf. Mt 13:52); they make it bear fruit and they vigilantly ward off errors that are threatening their flock (cf. 2 Tim 4:1-4)”.178
It is our common duty, and even before that our common grace, as Pastors and Bishops of the Church, to teach the faithful the things which lead them to God, just as the Lord Jesus did with the young man in the Gospel. Replying to the question “What good must I do to have eternal life?” Jesus referred the young man to God, the Lord of creation and of the Covenant. He reminded him of the moral commandments already revealed in the Old Testament and he indicated their spirit and deepest meaning by inviting the young man to follow him in poverty, humility and love: “Come, follow me!” The truth of this teaching was sealed on the Cross in the Blood of Christ: in the Holy Spirit, it has become the new law of the Church and of every Christian.
This “answer” to the question about morality has been entrusted by Jesus Christ in a particular way to us, the Pastors of the Church; we have been called to make it the object of our preaching, in the fulfilment of our munus propheticum. At the same time, our responsibility as Pastors with regard to Christian moral teaching must also be exercised as part of the munus sacerdotale: this happens when we dispense to the faithful the gifts of grace and sanctification as an effective means for obeying God’s holy law, and when with our constant and confident prayers we support believers in their efforts to be faithful to the demands of the faith and to live in accordance with the Gospel (cf. Col 1:9-12). Especially today, Christian moral teaching must be one of the chief areas in which we exercise our pastoral vigilance, in carrying out our munus regale.
178 Dogmatic Constitution on the Church Lumen Gentium, 25.
— Veritatis Splendor 114