20 Faith’s new way of seeing things is centred on Christ. Faith in Christ brings salvation because in him our lives become radically open to a love that precedes us, a love that transforms us from within, acting in us and through us. This is clearly seen in Saint Paul’s exegesis of a text from Deuteronomy, an exegesis consonant with the heart of the Old Testament message. Moses tells the people that God’s command is neither too high nor too far away. There is no need to say: "Who will go up for us to heaven and bring it to us?" or "Who will go over the sea for us, and bring it to us?" ( Dt 30:11-14). Paul interprets this nearness of God’s word in terms of Christ’s presence in the Christian. "Do not say in your heart, ‘Who will ascend into heaven?’ (that is, to bring Christ down), or ‘Who will descend into the abyss?’ (that is, to bring Christ up from the dead)" ( Rom 10:6-7). Christ came down to earth and rose from the dead; by his incarnation and resurrection, the Son of God embraced the whole of human life and history, and now dwells in our hearts through the Holy Spirit. Faith knows that God has drawn close to us, that Christ has been given to us as a great gift which inwardly transforms us, dwells within us and thus bestows on us the light that illumines the origin and the end of life.
Source: Lumen Fidei (Vatican.va)