Liturgical Decorum

To believe, and not to revere, to worship familiarly, and at one's ease, is an anomaly and a prodigy unknown even to false religions, to say nothing of the true one. . . . Worship, forms of worship -- such as bowing the knee, taking off the shoes, keeping silence, a prescribed dress, and the like -- are considered as necessary for a due approach to God.
--Bl John Henry Newman, Parochial and Plain Sermons