That’s the historic definition, Father. Unless you can reference a Lutheran theologian who says differently, it seems virtually universal that Lutheran theologians do not see SU as consubstantiation, nor do they define it as you do.
(1) What has given Lutheran theologians the right to define what the word consubstantiation means?
(2) Yes, I have heard you state that Lutheran theologians don’t see consubstantiation as sacramental union. That doesn’t mean that they are right. It could just mean that they are inconsistent, or that they argue against a straw man. But you are wrong. Without outright embracing the idea of consubstantiation, Wolfhart Pannenberg maintains that there is no meaningful distinction between sacramental union and consubstantiation. See his
, vol. 3Systematic Theology (Edinburgh: T&T Clark (1998): 296-297.
(3) Let’s take a look at the two links you posted. In the second one, from
LCMS, it is said that consubstantiation means that “bread and body form 1 substance (a “3d substance”) in Communion (similarly wine and blood) or that body and blood are present, like bread and wine, in a natural manner.” That is not a definition I have ever heard from anyone until I became involved in this discussion thread, and it is contradicted by the first link you provided, from
Theopedia. According to that article, consubstantiation “holds that during the sacrament the fundamental
substance of the body and blood of Christ are present
alongside the substance of the bread and wine, which remain present.” So which is it? Does consubstantiation mean that there is a ‘third substance’ or two substances, existing alongside one another? It cannot be both.
Instead of just repeating that sacramental union isn’t consubstantiation, could you explain what the difference is? Take as the starting point these two definitions:
Consubstantiation means that “during the sacrament the fundamental
substance of the body and blood of Christ are present
alongside the substance of the bread and wine, which remain present.” (
Theopedia)
Sacramental union means that “in the Holy Supper the two substances [Lat. *substantiae, Ger.
[zwei] Wesen], the natural bread and the true natural body of Christ, are present together here upon earth.” (
The Solid Declaration of the Formula of Concord)
Where is the difference between the two? You cannot say that it is because the former uses philosophy. When the authors of the
Formula of Concord decided to use the language it has used – that of
substantia and
Wesen – they chose to use philosophy.