Sounds like presbyopia, maybe you just need a new lens.(you can take that literally or figuratively) :-)
John Piper wrote about that on the DG blog fairly recently. I'm reading Deuteronomy too and have been so struck with God's telling the Israelites repeatedly that "this happened so that you will know that I am the Lord." He says the same thing to me.
I think if He's becoming smaller then you might be reading the bible to find what you want to find and not what He wants to teach you. Just my 2 cents.