You wrote: “Nothing in transubstantiation assumes that the wafer LITERALLY becomes the flesh of Christ. In other words one could not take a DNA sample from it. The chemical composition does not change, just the spiritual significance of eating it changes. This is not a difficult concept.”
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My response: Baloney. Study the Bible. For example, read Crazy John 6:53-56, which quotes Jesus as follows:
“Then Jesus said unto them, Verily, verily, I say unto you, Except ye eat the flesh of the Son of man, and drink his blood, ye have no life in you. Whoso eateth my flesh, and drinketh my blood, hath eternal life; and I will raise him up at the last day. For my flesh is meat indeed, and my blood is drink indeed. He that eateth my flesh, and drinketh my blood, dwelleth in me, and I in him.”
Yum. Now go read the Catechism of the Catholic Church (the “official” doctrine of the Catholic Church, which adopts the conclusion of the Council of Trent that the “Real Presence” of Christ, i.e. the actual body and blood of Christ, is not to be believed as a figurative or symbolic concept, but must be understood as objective reality. If you are Catholic, you are supposed to believe you literally are eating Christ during the Eucharist. To believe otherwise is anathema, as the Council of Trent put it, and the modern-day Catholic Church continues to accept, which means you are going to hell if you refuse to believe it. Protestants, of course, think this is all ridiculous.