7 Underlying all the Church's thinking is the awareness that she is the bearer of a message which has its origin in God himself (cf. 2 Cor 4:1-2). The knowledge which the Church offers to man has its origin not in any speculation of her own, however sublime, but in the word of God which she has received in faith (cf. 1 Th 2:13). At the origin of our life of faith there is an encounter, unique in kind, which discloses a mystery hidden for long ages (cf. 1 Cor 2:7; Rom 16:25-26) but which is now revealed: “In his goodness and wisdom, God chose to reveal himself and to make known to us the hidden purpose of his will (cf. Eph 1:9), by which, through Christ, the Word made flesh, man has access to the Father in the Holy Spirit and comes to share in the divine nature”. This initiative is utterly gratuitous, moving from God to men and women in order to bring them to salvation. As the source of love, God desires to make himself known; and the knowledge which the human being has of God perfects all that the human mind can know of the meaning of life.
Source: Fides et Ratio (Vatican.va)