From Vatican II's Dogmatic Constitution on Divine Revelation or Dei Verbum, chapter VI, number 21:
"In the sacred books the Father Who is in heaven comes lovingly to meet His children, and talks with them. And such is the force and power of the Word of God that it can serve the Church as her support and vigor, and the children of the Church as strength for their faith, food for the soul, and a pure and lasting fount of spiritual life. Scripture verifies in the most perfect way the words: 'The Word of God is living and active' (Heb. 4:12), and 'is able to build you up and to give you the inheritance among all those who are sanctified' (Acts 20:32; cf. 1 Th. 2:13)."