1 Corinthians was one of the first New Testament books to be written. At that point in time, the early church only did know in part. We need the full NT to open up the Old Testament for us.

Please consider the points raised in this study, as well as the word studies and parallel passages: 1 Corinthians 13:8-12.

Obviously there are some here who are going to disagree with my overall premise right at the start - but at least read the studies, see which words are used in the passage and the parallel passages (to determine if they are indeed referring to the same thing - ie, the glass/mirror being God's Word, which it is clearly declared in two other NT passages), and see the definitions of the words used - I list both Strong's and Webster's - so even those people who dislike Strong's can still see what the actual English words mean. Then after studying these passages and words out, you will be in a better position to discuss this issue - even if you disagree with my conclusions.

Song of Solomon 2:9 My beloved is like a roe or a young hart: behold, he standeth behind our wall, he looketh forth at the windows, shewing himself through the lattice.

In the OT, we see Jesus through a lattice, a screen, hidden - until the light of the NT shines on the OT - then you see Him everywhere, in the construction of the tabernacle, in the animal sacrifices, in the countless types, in the Messianic prophecies, and even in many other passages of Scripture (as the one who is speaking - see Isaiah 48:16, as the Angel of the Lord, as God walking in the Garden of Eden - see John 1:18 [it wasn't the Father appearing to them, as no man has seen the Father at any time - it was the Son that took on the appearance of flesh, then later was manifest in the flesh]).