It’s disheartening how many Catholics are confused about the true and substantial presence of Jesus in the Eucharist, in the last 50 years. Blame it on poor catechesis, a lack of good preaching, or whatever. Turns out things were not all that different in the middle of the 13th century. It took the vision of St Juliana of Cornillon and the Eucharistic miracle at Bolsena, Italy, in 1263 where the precious blood spilled out of the consecrated host and onto the corporal and altar cloth, to get folks’ attention. Pope Urban IV was so moved by the miracle, that he had the bloodied corporal moved to the cathedral in Orvieto where it resides today. (I’ve actually seen it. It’s pretty cool.) The following year Pope Urban proclaimed the universal celebration of the Solemnity of the Most Holy Body and Blood of Our Lord, commonly known by its Latin name of Corpus Christi.
Throughout the years, the Church has come up with various ways to try to describe this great mystery of our faith in the true presence of Christ in the Eucharist. Eventually, the best we could come up with was to use Greek philosophical categories to at least attempt to describe a little of what was going on. Briefly put, all things are made up of their substance and their attributes. The substance of a person or thing is its essence, its identity—what or who it is in and of itself. The attributes are what it looks like. Take yourself for example. You have always been you. Your identity has not changed. But your attributes have. As you aged, you got taller, more trim and better looking! Your substance is the same, but your attributes have changed.
In the Eucharist, the process is the opposite. The attributes remain the same. It still looks and tastes like bread and wine. However, the substance, the essence, the identity of the bread and wine is changed into the body, blood, soul and divinity of Christ.
Why? Well, quite frankly, because Jesus said so. Like the resurrection, the mechanics of this mystery escape us. Furthermore, we have to be careful not to get too bogged down in the details of sacramental analysis. We can try to understand certain aspects, and use, quite rightly, the term “trans-substantiation,” but even as we do so, we realize that we are only talking about one tiny aspect of the immensity of the reality that is the Eucharist. When we understand that all that Christ is, is truly present to all that we are; that there is nothing that separates us from the love of God in a holy communion at the very essence of who we are, it is truly astounding.