I certainly get that it seems like a "cop out," to say that we can't understand it all, but that is just simply how it is. For centuries, science has said the same thing about certain things. We've learned some things that were once unknowable, but I think we see the same thing happening in theology. The issue with theology vs science is that science (generally) has certain truths that 99% of scientists can get on board with. For example, I'm not really aware of a segment of the scientific community that works to discredit Newton's laws or thinks they're bogus. However, I'd suggest that in the 20th century, through the lens of liberation theology, we perhaps cleaned off some of the dirt on that glass which we see through. But it's not an open and shut case like the "discovery" of dark matter, not everyone will agree with it. So it seems like theology makes no progress, when in actuality, there is some being made.
To your point though, there are some passages that (in my m mind) that point towards perhaps a clearer picture. These passages include Col 1:19, 1 John 1:2 (or really several places in the Johannine epistles), John 1:14, just to name a few. For Christians, Jesus is not a dark mirror/glass, he is the view of God. The problem really that many, many Christians have forgotten that and put more emphasis on the Bible than they do Jesus. The Bible is the word (lower case) of God, Jesus is the Word (capital) of God. When we mix those two, we do certainly see things more darkly. The Bible is a flawed, dated, human-written text. I'd claim that it was divinely inspired, but it's still not perfect. I like to think that my sermons are also divinely inspired, as I prayerfully study, reflect, write, and edit them. But are they perfect, of course not! The Bible is still a source for theology/inspiration/insight, but it is NOT the of Christianity- Jesus is.
