Going Back to Narnia

Exact cover of the one I read as a kid

Recently I have been reading a lot of C.S. Lewis - some old, some new (Till We Have Faces.)  In my reading of the Last Battle (the last book in the Chronicles of Narnia) I was surprised to see something that I had never noticed before - a direct reference to Platonic thought.  In one of the best classes I have ever taken, Exegesis of the book of Hebrews, one of the best teachers I have ever had made the connection between Lewis and Plato (specifically - the Allegory of the Cave) in the context of Hebrews 8 (really Hebrews 7-10).  The indirect references were obvious to me after his explanation, but it was quite entertaining to see a direct reference that I had missed or not understood in one of my favorite books from my childhood.  See if you can see the connection in the following video, scripture, and book excerpt.

“Now the point in what we are saying is this: we have such a high priest, one who is seated at the right hand of the throne of the Majesty in heaven, a minister in the holy places, in the true tent that the Lord set up, not man. For every high priest is appointed to offer gifts and sacrifices; thus it is necessary for this priest also to have something to offer. Now if he were on earth, he would not be a priest at all, since there are priests who offer gifts according to the law. They serve a copy and shadow of the heavenly things. For when Moses was about to erect the tent, he was instructed by God, saying, “See that you make everything according to the pattern that was shown you on the mountain.” But as it is, Christ has obtained a ministry that is as much more excellent than the old as the covenant he mediates is better, since it is enacted on better promises (it's better because it was enacted on the "real" things - not the shadows). For if that first covenant had been faultless, there would have been no occasion to look for a second.
For he finds fault with them when he says: “Behold, the days are coming, declares the Lord, when I will establish a new covenant with the house of Israel and with the house of Judah, not like the covenant that I made with their fathers on the day when I took them by the hand to bring them out of the land of Egypt. For they did not continue in my covenant, and so I showed no concern for them, declares the Lord. For this is the covenant that I will make with the house of Israel after those days, declares the Lord: I will put my laws into their minds, and write them on their hearts, and I will be their God, and they shall be my people. And they shall not teach, each one his neighbor and each one his brother, saying, ‘Know the Lord,’ for they shall all know me, from the least of them to the greatest. For I will be merciful toward their iniquities, and I will remember their sins no more.”
In speaking of a new covenant, he makes the first one obsolete. And what is becoming obsolete and growing old is ready to vanish away.”
(Hebrews 8:1–13 ESV - emphasis and comments mine)

"Kings and Queens," he cried, "we have all been blind. We are only beginning to see where we are. From up there I have seen it all - Ettinsmuir, Beaversdam, the Great River, and Cair Paravel still shining on the edge of the Eastern Sea. Narnia is not dead. This is Narnia."
"But how can it be?" said Peter. "For Aslan told us older ones that we should never return to Narnia, and here we are."
"Yes," said Eustace. "And we saw it all destroyed and the sun put out."
"And it's all so different," said Lucy.
"The Eagle is right," said the Lord Digory. "Listen, Peter. When Aslan said you could never go back to Narnia, he meant the Narnia you were thinking of. But that was not the real Narnia. That had a beginning and an end. It was only a shadow or a copy of the real Narnia which has always been here and always will be here: just as our world, England and all, is only a shadow or copy of something in Aslan's real world. You need not mourn over Narnia, Lucy. All of the old Narnia that mattered, all the dear creatures, have been drawn into the real Narnia through the Door. And of course it is different; as different as a real thing is from a shadow or as waking life is from a dream." His voice stirred everyone like a trumpet as he spoke these words: but when he added under his breath "It's all in Plato, all in Plato: bless me, what do they teach them at these schools!" the older ones laughed. It was so exactly like the sort of thing they had heard him say long ago in that other world where his beard was grey instead of golden. He knew why they were laughing and joined in the laugh himself. But very quickly they all became grave again: for, as you know, there is a kind of happiness and wonder that makes you serious. It is too good to waste on jokes.
It is as hard to explain how this sunlit land was different from the old Narnia as it would be to tell you how the fruits of that country taste. Perhaps you will get some idea of it if you think like this. You may have been in a room in which there was a window that
looked out on a lovely bay of the sea or a green valley that wound away among mountains. And in the wall of that room opposite to the window there may have been a lookingglass. And as you turned away from the window you suddenly caught sight of that sea or that valley, all over again, in the looking glass. And the sea in the mirror, or the valley in the mirror, were in one sense just the same as the real ones: yet at the same time they were somehow different - deeper, more wonderful, more like places in a story: in a story you have never heard but very much want to know. The difference between the old Narnia and the new Narnia was like that. The new one was a deeper country: every rock and flower and blade of grass looked as if it meant more. I can't describe it any better than that: if ever you get there you will know what I mean.
It was the Unicorn who summed up what everyone was feeling. He stamped his right fore-hoof on the ground and neighed, and then cried:
"I have come home at last! This is my real country! I belong here. This is the land I have been looking for all my life, though I never knew it till now. The reason why we loved the old Narnia is that it sometimes looked a little like this. Bree-hee-hee! Come further up, come further in!" (emphasis mine)