In this spirit, on 25 January 1985, I [John Paul II] convoked an extraordinary assembly of the Synod of Bishops for the 20th anniversary of the close of the Council. The purpose of this assembly was to celebrate the graces and spiritual fruits of Vatican II, to study its teaching in greater depth in order that all the Christian faithful might better adhere to it, and to promote knowledge and application of it.
On that occasion the Synod Fathers stated: "Very many have expressed the desire that a catechism or compendium of all Catholic doctrine regarding both faith and morals be composed, that it might be, as it were, a point of reference for the catechisms or compendiums that are prepared in various regions. The presentation of doctrine must be biblical and liturgical. It must be sound doctrine suited to the present life of Christians."4 After the Synod ended, I made this desire my own, considering it as “fully responding to a real need of the universal Church and of the particular Churches”.5
For this reason we thank the Lord wholeheartedly on this day when we can offer the entire Church this “reference text” entitled the Catechism of the Catholic Church, for a catechesis renewed at the living sources of the faith!