The problem with Plato’s theory of forms, as I understand it, is that, in heaven, there is only one perfect chair, allowing perhaps only one perfect bottom to sit in it. I much prefer the vision that the author of Hebrews presents us: That heaven is real, and the earth is also. But that some things in heaven are so important that God, in his graciousness, has made copies of them here on earth, for our instruction, so that, seeing the earthly copy, and trusting in His word, we would look in faith to the heavenly original, and obtain the blessing that He intended.
Therefore it was necessary that the copies of the things in the heavens should be purified with these, but in the heavenly things themselves with better sacrifices than those. For Christ has not entered the holy places made with hands, which are copies of the true, but into heaven itself, now to appear in the presence of God for us; not that he should offer Himself often, as the high priest enters the Most Holy Place every year with the blood of another – He then would have had to suffer since the foundation of the world; but now, once at the end of the ages, He has appeared to put away sin by the sacrifice of Himself. And as it is appointed for meant to die once, but after this the judgment, so Christ was offered once to bear the sins of many.