You miss the point. the writer states that it is NOT a personal union. He says clearly it is supernatural, incomprehensible, inexplicable. If it is these things, then it cannot be explained.
"The difference, over against Wyclif and his theory on remanence is this: For Wyclif, bread and wine remained what they were before; only sacramentally, that is, figuratively, they became the body and blood of Christ.* For Luther, the bread is the body in an incomprehensible way; the union between the bread and the body cannot be expressed in terms of any philosophical theory or rational explanation; it is an object of faith, based solely on the words of Christ. ***The question which was put to him, not only by Zwingli, but also by his older adversaries, as to how the bread could be called the body of Christ if it still remained bread, was answered by Luther in pointing out the mode of speech called synecdoche. In his great controversy with Carlstadt he had already explained the words ‘This is my body’ as synecdoche. ‘This’ referred to what Jesus held in his hands, the bread, not (as Carlstadt’s impossible exegesis would suggest) to the body to which Jesus pointed. As a mother, pointing to the cradle in which her baby lies, says, ‘This is my child’, or as a man, pointing to a purse, may say, ‘Here is a hundred dollars’, so we say of the bread in a similar way, “This is the body of Christ’. This is a common mode of speech called synecdoche, an abbreviated speech in which the containing vessel is mentioned instead of its content. The objection, especially by Zwingli, that thus Luther himself did not understand the sacramental words literally, but figuratively, was refuted by Luther as not being to the point, because the reality of the body was not denied. In all other figures of speech, the words ‘body’ and ‘blood’ are understood figuratively; the synecdoche takes the reality of the elements as well as the reality of body and blood seriously.
The Lutheran view, therefore, cannot be put on the same level with the figurative understanding on the one hand, or with transubstantiation on the other hand, as was done by its critics on both sides. Luther was quite clear about the fact that the synecdoche is, also, only an attempt to describe a fact that defies human explanation. The Real Presence remained for him an inexplicable mystery. All his answers are nothing more than attempts to refute the denial of this miracle as something impossible. No human reason can explore how this miracle can take place." - Hermann Sasse
So, for this Lutheran, I only know what Christ says: “This [bread] is my body”. I do not know how. I do know I receive His true body. Whether or not I receive bread is, quite frankly, irrelevant.
Jon
