I respectfully disagree that Adam had eaten from the tree of life.
Also, I stand by my opinion that Adam couldn't procreate without eating from the tree of knowledge. He didn't even realize he was naked until that time, let alone know what to do with his nakedness:
"Who told you that you were naked? Have you eaten from the tree I commanded you not to eat from?" - Gen 3:11
IF Adam had eaten from the tree of life, God surely couldn't have prevented him from living forever, otherwise there wouldn't have been such a sense of urgency to remove the couple from the Garden of Eden. If they had already eaten from it, God wouldn't have cared so much, but he was dead set on PREVENTING him from eating from it. Just because he had free will to eat from every tree BUT that one, doesn't mean that he ate from the tree of life, there was alot of trees in this Garden. It's never mentioned that he ever did eat from it, only that God had to prevent him from eating from it AFTER Adam had gained knowledge, 'lest he live forever'. Surely God knew that at this point Adam had the knowledge he needed to understand what the tree of life could mean for him. And that's why there was the urgency at that time.
"The man has now become like one of us, knowing good from evil. He must not be allowed to also reach out his hand and partake also from the tree of life and eat, and live forever." Gen 3:21
And then God placed the Cherubim as guards at the gates of the Garden, to protect the tree. So you see, even after Adam had eaten from the tree of knowledge, God could not have prevented him from living forever, had he then eaten from the tree of life. Even after Adam had been kicked out of the Garden, had he been able to sneak back in and partake of the tree, he would have lived forever, and that's why the guards were in place.
So what makes you think God could have prevented Adam from living forever had he eaten from the tree of life prior to that event? He couldn't have. Adam never partook from the tree of life because he couldn't comprehend what that meant, not until after he had eaten from the tree of knowledge. Bad luck I'd say, had he even mistakenly eaten from the tree of life prior to eating from the tree of knowledge, God couldn't have done a thing. Adam would have had knowledge AND lived forever.
If God had to take such drastic measures to prevent them from eating from this tree and living forever, even after they were removed from the Garden, then surely had they eaten from this miraculous tree right off the bat, they'd have been all set from the beginning.
Rev