The Novus Ordo Missae, considering the new elements widely susceptible to widely different interpretations which are implied or taken for granted, represents, both as a whole and in its details, a striking departure from the Catholic theology of the Mass as it was formulated in Session 22 of the Council of Trent. The "canons" of the rite definitively fixed at that time erected an insurmountable barrier against any heresy which might attack the integrity of the Mystery.