Liturgical theology is sometimes seen as the preserve of antiquarians and monks, cute and reassuring but irrelevant to the large issues of theology and to the mission of the Church. Nothing could be further from the truth
Liturgical or ritual theology is one of the chief fronts in the Church’s war against the heresy of Christianity.
Which is to say, liturgical theology is one of the chief fronts in the war against secular modernity.
-Peter Leithart, Against Christianity, 81-82.