Dei Verbum, the Dogmatic Constitution on Divine Revelation issued by the Second Vatican Council in 1965, explains the importance of divine revelation and its relationship with sacred Scripture (the Bible) and Tradition. The document was written "so that by hearing the message of salvation the whole world may believe, by believing it may hope, and by hoping it may love" (Preface).
Jesus Christ "perfected revelation by fulfilling it" through his life, death, and resurrection. He commissioned the Apostles to preach what he taught them. Consequently, "by their oral preaching, by example, and by observances" they "handed on what they had received from the lips of Christ, from living with Him, and from what He did, or what they had learned through the prompting of the Holy Spirit." The Apostles and others "under the inspiration of the Holy Spirit" fulfilled this commission by writing down "the message of salvation." Their writings became the New Testament. The four Gospels "faithfully hand on what Jesus Christ, while living among men, really did and taught for their eternal salvation until the day He was taken up into heaven." In the other books of the New Testament, "those matters which concern Christ the Lord are confirmed, His true teaching is more and more fully stated, the saving power of the divine work of Christ is preached, the story is told of the beginnings of the Church and its marvelous growth, and its glorious fulfillment is foretold."
Thus, reading the Bible is an important part of the Christian life:
in the sacred books, the Father who is in heaven meets His children with great love and speaks with them; and the force and power in the word of God is so great that it stands as the support and energy of the Church, the strength of faith for her sons, the food of the soul, the pure and everlasting source of spiritual life. (Chapter 6)