11 The Apostles held undeviatingly to the principles of their divine Master. When the Holy Spirit had descended on them in the form of fiery tongues, Peter expressed his invitation to the multitudes to seek rebirth in Christ and to accept the gifts of the most holy Paraclete in these words: "Do penance and be baptized, every one of you, in the name of Jesus Christ, for the remission of your sins. And you will receive the gift of the Holy Spirit."(11) Paul too, the teacher of the Gentiles, announced to the Romans in no uncertain terms that the kingdom of God did not consist in an attitude of intellectual superiority or in indulging the pleasures of sense. It consisted in the triumph of justice and in peace of mind. "For the kingdom of God does not consist in food and drink, but in justice and peace and joy in the Holy Spirit."(12)
Source: Paenitentiam Agere (Vatican.va)