6. The dialogue of Jesus with the rich young man, related in the nineteenth chapter of Saint Matthew’s Gospel, can serve as a useful guide for listening once more in a lively and direct way to his moral teaching: “Then someone came to him and said, ‘Teacher, what good must I do to have eternal life?’ And he said to him, ‘Why do you ask me about what is good? There is only one who is good. If you wish to enter into life, keep the commandments. ‘He said to him, ‘Which ones?’ And Jesus said, ‘You shall not murder; You shall not commit adultery; You shall not steal; You shall not bear false witness; Honour your father and mother; also, You shall love your neighbour as yourself.’ The young man said to him, ‘I have kept all these; what do I still lack?’ Jesus said to him, ‘If you wish to be perfect, go, sell your possessions and give the money to the poor, and you will have treasure in heaven; then come, follow me’ ” (Mt 19:16-21).13
7. “Then someone came to him…“. In the young man, whom Matthew’s Gospel does not name, we can recognize every person who, consciously or not, approaches Christ the Redeemer of man and questions him about morality. For the young man, the question is not so much about rules to be followed, but about the full meaning of life. This is in fact the aspiration at the heart of every human decision and action, the quiet searching and interior prompting which sets freedom in motion. This question is ultimately an appeal to the absolute Good which attracts us and beckons us; it is the echo of a call from God who is the origin and goal of man’s life. Precisely in this perspective the Second Vatican Council called for a renewal of moral theology, so that its teaching would display the lofty vocation which the faithful have received in Christ,14 the only response fully capable of satisfying the desire of the human heart.
In order to make this “encounter” with Christ possible, God willed his Church. Indeed, the Church “wishes to serve this single end: that each person may be able to find Christ, in order that Christ may walk with each person the path of life”.15
“Teacher, what good must I do to have eternal life?” (Mt 19:16)
8. The question which the rich young man puts to Jesus of Nazareth is one which rises from the depths of his heart. It is an essential and unavoidable question for the life of every man, for it is about the moral good which must be done, and about eternal life. The young man senses that there is a connection between moral good and the fulfilment of his own destiny. He is a devout Israelite, raised as it were in the shadow of the Law of the Lord. If he asks Jesus this question, we can presume that it is not because he is ignorant of the answer contained in the Law. It is more likely that the attractiveness of the person of Jesus had prompted within him new questions about moral good. He feels the need to draw near to the One who had begun his preaching with this new and decisive proclamation: “The time is fulfilled, and the Kingdom of God is at hand; repent, and believe in the Gospel” (Mk 1:15).
People today need to turn to Christ once again in order to receive from him the answer to their questions about what is good and what is evil. Christ is the Teacher, the Risen One who has life in himself and who is always present in his Church and in the world. It is he who opens up to the faithful the book of the Scriptures and, by fully revealing the Father’s will, teaches the truth about moral action. At the source and summit of the economy of salvation, as the Alpha and the Omega of human history (cf. Rev 1:8; 21:6; 22:13), Christ sheds light on man’s condition and his integral vocation. Consequently, “the man who wishes to understand himself thoroughly — and not just in accordance with immediate, partial, often superficial, and even illusory standards and measures of his being — must with his unrest, uncertainty and even his weakness and sinfulness, with his life and death, draw near to Christ. He must, so to speak, enter him with all his own self; he must ‘appropriate’ and assimilate the whole of the reality of the Incarnation and Redemption in order to find himself. If this profound process takes place within him, he then bears fruit not only of adoration of God but also of deeper wonder at himself”.16
If we therefore wish to go to the heart of the Gospel’s moral teaching and grasp its profound and unchanging content, we must carefully inquire into the meaning of the question asked by the rich young man in the Gospel and, even more, the meaning of Jesus’ reply, allowing ourselves to be guided by him. Jesus, as a patient and sensitive teacher, answers the young man by taking him, as it were, by the hand, and leading him step by step to the full truth.
“There is only one who is good” (Mt 19:17)
9. Jesus says: “Why do you ask me about what is good? There is only one who is good. If you wish to enter into life, keep the commandments” (Mt 19:17). In the versions of the Evangelists Mark and Luke the question is phrased in this way: “Why do you call me good? No one is good but God alone” (Mk 10:18; cf. Lk 18:19).
Before answering the question, Jesus wishes the young man to have a clear idea of why he asked his question. The “Good Teacher” points out to him — and to all of us — that the answer to the question, “What good must I do to have eternal life?” can only be found by turning one’s mind and heart to the “One” who is good: “No one is good but God alone” (Mk 10:18; cf. Lk18:19). Only God can answer the question about what is good, because he is the Good itself.
To ask about the good, in fact, ultimately means to turn towards God, the fullness of goodness. Jesus shows that the young man’s question is really a religious question, and that the goodness that attracts and at the same time obliges man has its source in God, and indeed is God himself. God alone is worthy of being loved “with all one’s heart, and with all one’s soul, and with all one’s mind” (Mt 22:37). He is the source of man’s happiness. Jesus brings the question about morally good action back to its religious foundations, to the acknowledgment of God, who alone is goodness, fullness of life, the final end of human activity, and perfect happiness.