Paragraph 3: On who's terms? A modern commentary on the Doctrine of the Eucharist says: "Before the transubstantiation in the Mass, the inner reality ('substance') of the bread and wine is what sustains the external appearances ('accidents') in existence. These ('accidents') appearances tell us of the presence of the inner reality ('substance') of bread and wine (which itself is not visible). After the transubstantiation, the risen humanity of Christ is (the 'substance' that) sustains these external appearances ('accidents') in existence." The above was written in 1965. I only cite it because it is still the language of the Church today. The Catechism, paragraph 1376, says: "The Council of Trent summarises the Catholic faith by declaring: "Because Christ our Redeemer said that it was truly his body that he was offering under the species of bread, it has always been the conviction of the Church of God, and this holy Council now declares again, that by the consecration of the bread and wine there takes place a change of the whole substance of the bread into the substance of the body of Christ our Lord and of the whole substance of the wine into the substance of his blood. This change the holy Catholic Church has fittingly and properly called transubstantiation." (Council of Trent 1551). I raise this to highlight a simple and singular fact: The Mystery of the Eucharist, the Transubstantiation, is explained in terms of Aristotelian philosophical terms – 'substance' and 'accidents'. I'm not saying the terms are no longer relevant, but they certainly aren't to the contemporary mind – how many Catholics today are cognisant of Aristotelian terminology, and its philosophical implications? The Church rests on a statement made in the 16th century. Again, I'm not saying the philosophy is redundant – it isn't. But the world has moved on a lot. And one person commented that the doctrine becomes unfathomable when most contemporary use of 'substance' refers to illegal, recreational stuff, and 'accidents' implies a car crash or a need of clean underwear.