Evangelium Vitae §37

³⁷ The life which the Son of God came to give to human beings cannot be reduced to mere existence in time. The life which was always "in him" and which is the "light of men" (Jn 1:4) consists in being begotten of God and sharing in the fullness of his love: "To all who received him, who believed in his name, he gave power to become children of God; who were born, not of blood nor of the will of the flesh nor of the will of man, but of God" (Jn 1:12-13). Sometimes Jesus refers to this life which he came to give simply as "life", and he presents being born of God as a necessary condition if man is to attain the end for which God has created him: "Unless one is born anew, he cannot see the kingdom of God" (Jn 3:3). To give this life is the real object of Jesus' mission: he is the one who "comes down from heaven, and gives life to the world" (Jn 6:33). Thus can he truly say: "He who follows me ... will have the light of life" (Jn 8:12). At other times, Jesus speaks of "eternal life". Here the adjective does more than merely evoke a perspective which is beyond time. The life which Jesus promises and gives is "eternal" because it is a full participation in the life of the "Eternal One". Whoever believes in Jesus and enters into communion with him has eternal life (cf. Jn 3:15; 6:40) because he hears from Jesus the only words which reveal and communicate to his existence the fullness of life. These are the "words of eternal life" which Peter acknowledges in his confession of faith: "Lord, to whom shall we go? You have the words of eternal life; and we have believed, and have come to know, that you are the Holy One of God" (Jn 6:68-69). Jesus himself, addressing the Father in the great priestly prayer, declares what eternal life consists in: "This is eternal life, that they may know you the only true God, and Jesus Christ whom you have sent" (Jn 17:3). To know God and his Son is to accept the mystery of the loving communion of the Father, the Son and the Holy Spirit into one's own life, which even now is open to eternal life because it shares in the life of God.