Hey dronald. Glad you are joining us now. Marcos was a little outnumbered.
It’s quite possible that they took his words metaphorically initially. In fact, I’m almost certain they did. Until the Last Supper, they had no way of knowing HOW they were to eat his flesh and drink his blood. So how else could they have taken it? This doesn’t prove much though for the Protestant position. The fact that the apostles might not have grasped the full meaning of Jesus’ words initially doesn’t mean Jesus wasn’t speaking literally. It just means he wasn’t done teaching them because they weren’t yet ready. (Jn 16:12)
That’s actually why I’ve argued here that John 6 by itself is not enough to prove the Eucharist true or false. It needs to be read in light of what Jesus does at the Last Supper. In isolation from the Last Supper accounts, a literal reading of John 6 doesn’t make much sense. A symbolic reading doesn’t really either, given Jesus’ extreme emphasis on actually eating his flesh, but unless Jesus left us a way to physically eat his body and drink his blood, a symbolic reading really is the only option.
But since he DID leave us a way to do that, at the Last Supper, this changes things considerably.