Jesus Christ, The True Light that Enlightens Everyone
Called to salvation through faith in Jesus Christ "the true light that enlightens everyone" (Jn 1:9), people become "light in the Lord" and "children of light" (Eph 5:8), and are made holy by "obedience to the truth" (1 Pet 1:22).
This obedience is not always easy. As a result of that mysterious original sin, committed at the prompting of Satan, the one who is "a liar and the father of lies" (Jn 8:44), man is constantly tempted to turn his gaze away from the living and true God in order to direct it towards idols (cf. 1 Thes 1:9), exchanging "the truth about God for a lie" (Rom 1:25). Man's capacity to know the truth is also darkened, and his will to submit to it is weakened. Thus, giving himself over to relativism and scepticism (cf. Jn 18:38), he goes off in search of an illusory freedom apart from truth itself.
But no darkness of error or of sin can totally take away from man the light of God the Creator. In the depths of his heart there always remains a yearning for absolute truth and a thirst to attain full knowledge of it. This is eloquently proved by man's tireless search for knowledge in all fields. It is proved even more by his search for the meaning of life. The development of science and technology, this splendid testimony of the human capacity for understanding and for perseverance, does not free humanity from the obligation to ask the ultimate religious questions. Rather, it spurs us on to face the most painful and decisive of struggles, those of the heart and of the moral conscience.
No one can escape from the fundamental questions: What must I do? How do I distinguish good from evil? The answer is only possible thanks to the splendour of the truth which shines forth deep within the human spirit, as the Psalmist bears witness: "There are many who say: 'O that we might see some good! Let the light of your face shine on us, O Lord'" (Ps 4:6).
The light of God's face shines in all its beauty on the countenance of Jesus Christ, "the image of the invisible God" (Col 1:15), the "reflection of God's glory" (Heb 1:3), "full of grace and truth" (Jn 1:14). Christ is "the way, and the truth, and the life" (Jn 14:6). Consequently the decisive answer to every one of man's questions, his religious and moral questions in particular, is given by Jesus Christ, or rather is Jesus Christ himself, as the Second Vatican Council recalls: "In fact, it is only in the mystery of the Word incarnate that light is shed on the mystery of man. For Adam, the first man, was a figure of the future man, namely, of Christ the Lord. It is Christ, the last Adam, who fully discloses man to himself and unfolds his noble calling by revealing the mystery of the Father and the Father's love".
Jesus Christ, the "light of the nations", shines upon the face of his Church, which he sends forth to the whole world to proclaim the Gospel to every creature (cf. Mk 16:15). Hence the Church, as the People of God among the nations, while attentive to the new challenges of history and to mankind's efforts to discover the meaning of life, offers to everyone the answer which comes from the truth about Jesus Christ and his Gospel. The Church remains deeply conscious of her "duty in every age of examining the signs of the times and interpreting them in the light of the Gospel, so that she can offer in a manner appropriate to each generation replies to the continual human questionings on the meaning of this life and the life to come and on how they are related".
The Church's Pastors, in communion with the Successor of Peter, are close to the faithful in this effort; they guide and accompany them by their authoritative teaching, finding ever new ways of speaking with love and mercy not only to believers but to all people of good will. The Second Vatican Council remains an extraordinary witness of this attitude on the part of the Church which, as an "expert in humanity", places herself at the service of every individual and of the whole world.
The Church knows that the issue of morality is one which deeply touches every person; it involves all people, even those who do not know Christ and his Gospel or God himself. She knows that it is precisely on the path of the moral life that the way of salvation is open to all. The Second Vatican Council clearly recalled this when it stated that "those who without any fault do not know anything about Christ or his Church, yet who search for God with a sincere heart and under the influence of grace, try to put into effect the will of God as known to them through the dictate of conscience... can obtain eternal salvation". The Council added: "Nor does divine Providence deny the helps that are necessary for salvation to those who, through no fault of their own have not yet attained to the express recognition of God, yet who strive, not without divine grace, to lead an upright life. For whatever goodness and truth is found in them is considered by the Church as a preparation for the Gospel and bestowed by him who enlightens everyone that they may in the end have life".