“It pleased God, in his goodness and wisdom, to reveal himself and to make known the mystery of his will. His will was that men should have access to the Father, through Christ, the Word made flesh, in the Holy Spirit, and thus become sharers in the divine nature.”

Catechism of the Catholic Church no. 51, which quotes Dei Verbum 2

When we say “the mystery of God’s will,” we do not mean an unsolvable puzzle, but rather something that goes beyond our ability to understand on our own. In order for us to know or understand it, it must be shown or revealed to us. Therefore, God’s will for humanity was not a puzzle to solve or something unknowable entirely. Rather, God, the all-powerful Creator of the universe. revealed it to us because it is His will.

The Catechism says that “in order to reveal Himself to men...God speaks to them in human words” (CCC 101). Scripture is the written record of God’s revelation of Himself to humanity. God has made His will known to us through His Word, which we find written in the Bible.