I have more to write on my Romans passages, but I was reading in Matthew last night, and came across another example of the Lord using a food parable to get His point across in a similar manner that He was attempting to do in John 6. Of course, John 6 is the often referred to chapter in John when someone is trying to promote the idea of transubstantiation. You can read my post on that chapter, and transubstantiation here: John 6 and Transubstantiation (pt. 1).
Let’s look in Matthew;
Matthew 16:5 And when his disciples were come to the other side, they had forgotten to take bread. 6 Then Jesus said unto them, Take heed and beware of the leaven of the Pharisees and of the Sadducees. 7 And they reasoned among themselves, saying, It is because we have taken no bread. 8 Which when Jesus perceived, he said unto them, O ye of little faith, why reason ye among yourselves, because ye have brought no bread? 9 Do ye not yet understand, neither remember the five loaves of the five thousand, and how many baskets ye took up? 10 Neither the seven loaves of the four thousand, and how many baskets ye took up? 11 How is it that ye do not understand that I spake it not to you concerning bread, that ye should beware of the leaven of the Pharisees and of the Sadducees? 12 Then understood they how that he bade them not beware of the leaven of bread, but of the doctrine of the Pharisees and of the Sadducees.
First notice that the apostles tried to take Christ literally. He’s talking about bread and leaven…He must be referring to the literal, right? Nope. Next notice that Jesus does not correct them outright; He makes them get to the conclusion on their own. He gives them the non-sinful equivalent of an eye roll. They do eventually catch on to the truth themselves; Jesus was being metaphorical.
I also note that when He brought used the idea of bread and leaven here, that He was speaking about doctrine. That further supports that idea that He was also speaking of doctrine, or partaking of the the words of life, in John 6, not His literal body.