Pope John Paul II makes it clear in Catechesi Tradendae:
[C]atechesis needs to be continually renewed by a certain broadening of its concept, by the revision of its methods, by the search for suitable language, and by the utilization of new means of transmitting the message. Renewal is sometimes unequal in value; the synod fathers realistically recognized, not only an undeniable advance in the vitality of catechetical activity and promising initiatives, but also the limitations or even "deficiencies" in what has been achieved to date. These limitations are particularly serious when they endanger integrity of content. The message to the People of God rightly stressed that "routine, with its refusal to accept any change, and improvisation, with its readiness for any venture, are equally dangerous" for catechesis. Routine leads to stagnation, lethargy and eventual paralysis. Improvisation begets confusion on the part of those being given catechesis and, when these are children, on the part of their parents; it also begets all kinds of deviations, and the fracturing and eventually the complete destruction of unity. It is important for the Church to give proof today, as she has done at other periods of her history, of evangelical wisdom, courage and fidelity in seeking out and putting into operation new methods and new prospects for catechetical instruction.