“From this it follows that every liturgical celebration, because it is an action of Christ the priest and of his Body the Church, is a sacred action, surpassing all others” (Constitution on the Sacred Liturgy, 7. St. Benedict).
When I was searching for a church, it became apparent to me, early on, that I was being drawn to an apostolic, catholic and liturgical tradition. Apostolic in the sense that the teachings and traditions of the church had been handed down, Bishop to Bishop, since the beginning. Catholic in the sense that it was a universal, global body, and liturgical because it somehow made sense to me that the emphasis of the service had to be the Eucharist and the prayers to God... not the homily. This is about as radical a departure from Unitarian Universalism as you can get!
I do sometimes wish that my church was more charismatic. It wouldn't hurt us to have a few 'Amens' shouted out now and then. We tried dancing in the aisles once... when we had a U2 Eucharist. It was pretty obvious that most folks were pretty uncomfortable being out of the neat pews with the doors on them. But if I have to choose between singing a plainchant psalm or getting fired up by a preacher, I am going for the psalm every time.
Something happens in the process of the mass. Something shifts. The host becomes God. The wine is his blood. For me, there is no question that the real presence of God is there. How it happens, I don't know. Theologians have been fussing over that since the reformation. But however it works, I honestly believe it does.
I am not a theologian. I know nothing about the mechanics of any of this. What I know, is that every time I go to mass and take the body and blood of my Lord into myself, I am sanctified by it. I am transformed. Made whole.