The Catechism (#113) reminds us of the three criteria which the Second Vatican Council (Dei Verbum 12) lays down for us to insure that we interpret Sacred Scripture in accordance with the same Spirit who inspired it in the first place:
1) Be especially attentive "to the content and unity of the whole of Scripture."
2) Read the Scripture within "the living Tradition of the whole Church." According to a saying of the Fathers, Sacred Scripture is written principally in the Church's heart rather than in documents and records, for the Church carries in her Tradition the living memorial of God's Word, and it is the Holy Spirit who gives her the spiritual interpretation of the Scripture.
3) Be attentive to the analogy of faith (Cf. Rom 12:6). By analogy of faith we mean the coherence of the truths of faith among themselves and within the whole plan of Revelation.
The very commendable growth in interest in the study of Sacred Scripture which often manifests itself in Bible study groups must take the teaching of Vatican II into account. These three principles must be used in order to insure that what we are really doing is interpreting the written Word of God in accordance with the Spirit who inspired it in the first place.
On a practical note, I highly recommend The Navarre Bible, a unique set of commentaries on the New Testament books published by Four Courts Press and distributed in the United States by Scepter Press. It is available from most good Catholic book stores, as well as direct from Scepter Press. This set, prepared by the Ecclesiastical Faculty of Theology of the University of Navarre, beautifully incorporates all of the principles above stated in a very simple, readable, and spiritually enriching presentation. It can be a great help to Scripture study groups or to individuals who desire to read the Bible as the Catholic Church does.