...I myself have yet to mention in a very public way the consideration which essentially accompanies our realization of Christ’s true presence and our natural and supernatural response of reverence. The liturgy, as the worship which the Holy Spirit has given His Church, always requires beauty in its celebrations.
...it is equally important for something to be good so that it also might be judged beautiful. The truth, which is clothed by beauty, must be such as to ennoble the human person in terms of bringing out his or her very best, both of intellect and of will. The beautiful must embody that which is true, but also ennobling to our human nature as made in the image and likeness of God. Whatever is beautiful must fix our minds and our hearts on the things above, according to St. Paul (Phil 4).
[Note well: it is 'minds AND hearts,' not just one or the other. And it can be argued that the further from a balance of the two, the less it is beautiful.]
When one realizes that to be authentically beautiful, something must be both true and ennobling of our human nature, that tells us a great deal about what exactly is appropriate at the liturgy. Because it is the source and the summit of our lives as followers of Christ, the liturgy must never be anything less than beautiful, beautiful in such wise as to evoke the correct sacramental attitude of reverence, beautiful as befitting our communion at the liturgy with all the angels and saints.
Some very good stuff, there, Excellency!!