Here is a great lecture by Dr. Peter Kwasniewski. I suppose a brief (and poor) summary might be: While the core essence of the Mass is Christ offering Himself on our behalf to the Father, all the other elements of the Mass are also important because it is through the “accidents” of the Mass that we have access to the “substance” of the Mass. This is true not only for the Eucharist and the doctrine of transubstantiation, but everything else, the smells and bells, kneeling and genuflecting, chant and prayers, etc.
Having recently finished his excellent book Noble Beauty, Transcendent Holiness
Why the Modern Age Needs the Mass of Ages, I look forward to finding anything else he has done. Dr. Kwasniewski is a particularly eloquent spokesperson for the usus antiquior.
His lecture is perhaps a bit technical, but still easy to follow, and worth the listen. I thoroughly enjoyed it.
I myself have been interested in this topic, especially the physicality of worship, for some time. Three years ago, after I had begun to make a more concerted effort to pray in the morning, I wrote on the physicality of faith. And more than four years ago I wrote a piece on reducing faith and worship down to some absolute minimum, which I called an inhuman experiment.