I think JimG and I mean the same thing, we’re just using imprecise terminology.
Let’s see exactly what St. Thomas’s theology is on the Eucharist:
Just a quick quote from this lovely article (
ewtn.com/library/Theology/HETHOSAQ.HTM):
**
The Eucharistic theology of Thomas Aquinas is remarkable for its clarity and perception. But Thomas was not only able to set it out masterfully; his contemplation of the Eucharist was so intense that it tapped a poetic vein and enabled him to imbue with lyrical tones a dogmatic language so perfect and refined as to produce sequences and hymns that we all know and still sing.**
Now more on what we’re talking about:
**Substance—Substance is the primary mode of being and defines what a thing is. Substance is the foundation of reality and cannot be pictured in the mind without also picturing the accidents that inhere in the substance. **
**
The remaining categories of being are accidents: secondary modes of being.
Quantity—quantity allows us to define the parts in a substance. For example, a tabby cat has two ears, two eyes and a multitude of atoms and genetic material.
Quality—quality is a descriptive term such as, the softness and brown color of a tabby cat.
Relation—relation identifies the relative state between two objects. For example, that tabby cat has the same color fur as the Angolan cat.
Action—the action of the subject is also an accident. Action does not necessarily imply motion or change. For example, “the tabby cat is sitting still” is a valid action accident of the cat.
Passion—In the philosophic sense, passion is defined as change. For example, we can say that the aging process of the tabby cat is a passion.
Location—Location is also an accident. For example, we could say that an accident of the tabby cat is that it is sitting on top of the sofa.
Posture—Posture identifies the spatial orientation of the subject. For example, we can say the tabby cat is sitting with all four feet on the floor and it’s tail is in motion.
Temporality—Temporality is the affectation of time on the subject. For example, the tabby cat is seven years old.
State—State seems to imply change in the subject which allows us to identify it from other subjects. For example, the tabby cat currently has both eyes closed and is falling asleep.**
…
**Prime Matter and Substantial Form
Now that we understand the difference between a substance and an accident as well as the ten categories of being, we can attempt to further understand what exactly a substance really is. Aristotle believed that
a substance is composed of prime matter and form. Prime matter is not the same thing as physical matter (the kind we usually think of as composed of atoms). Instead, prime matter should be thought of in terms of potency and actuality. Prime matter is nothing more than pure potency. It is the substantial underlying reality of all things, and as such, has the potential to become anything. Prime matter (since it is substantial)
has no physical appearance, quality or quantity. Prime matter cannot even be thought of separate from form.
Form is what allows prime matter to become substance. For instance, all of the elements on the Periodic Table (such as iron, gold, silver, mercury, etc.) can be thought of as comprised of prime matter. The thing that differentiates the elements from each other is their form. Silver and gold are composed of the same prime matter but have different form. Form and prime matter constitute the substance of any object, and the substance of that object is inhered with accidents that give the substance a physical character.**
Source:
saintaquinas.com/primer.html
Now
everything but the substance-every physical quality-is still present in the Host. The only thing that changes in the host is the Prime Matter, which is
not the same as physical matter, and the form. The PHYSICAL matter is unchanged. Which means there’s no reason it can’t have bacteria on it.
Here’s another question: If the Blessed Sacrament cannot transmit disease, how come people with gluten allergies need to receive a special low gluten form of the host? Theoretically it shouldn’t matter since Jesus is present in the host and wouldn’t somebody receiving Him to get sick.