Dogs see the world in shades of grey. They do not have the technology to observe the parts of the spectrum their eyes cannot see and they do not have the mental capability (as far as we know) to imagine that there might be other colours. However, none of this means that the full spectrum does not exist. It most certainly does.
I believe it is the same with our understanding of God. I have always stated on this blog that I am confidant that God is a scientific reality. That God is potentially observable using scientific methods. That faith and science are NOT two different things. That God is as real as the chair I am now sitting on. The fact that we may never be in a position to observe God scientifically does not mean that God does not have a scientifically provable reality. It simply means we are like dogs, unaware of the true nature of existence and incapable, at least at present, to even imagine it.