EN
A liturgical book is a unique device intended to mediate divine and human reality: liturgical celebration. No other text is called upon to carry out a similar mission. As a result, our book of liturgy needs to be thoroughly known and its different contents studied. The task facing the present contribution, then, is to become familiar with the tools that influenced and sustained Christian worship in the post-Tridentine period until Vatican II. Comparisons with Tridentine liturgical texts demonstrates the continuity that is always present in Christian worship despite the reforms required to identify language appropriate to the expectations of the assembly, and celebrations that are genuine expressions of worship in Spirit and in truth.