The renwal of liturgical theology was the fruit of a long period of important philological, historical, archaeological, theological, patristic, and biblical studies. But if the return to the sources of the liturgy did not have as its goal the return to the liturgy as source, the entire project would be useless, or of secondary importance at best.
Andrea Grillo, Beyond Pius V: Conflicting Interpretations of the Liturgical Reform, trans. Barry Hudock, Rev. Ed. (Collegeville, MN: Liturgical Press, 2013), p. 25. ISBN: 978-0-8146-6327-1.