1 Corinthians 13:12 ESV
For now we see in a mirror dimly, but then face to face. Now I know in part; then I shall know fully, even as I have been fully known.
Paul says here that, in this life, we see dimly. Those of you who spend much time reading Christian books or blogs will doubtless come across an argument something like this: "because we can only see dimly, and as finite creatures could never fully know the infinite God, we shouldn't focus too much on trying to nail down what the Bible says or means; because by its own admission, we never will."
What I want to encourage you with is this: if God had given us the tools (eg, the Bible, a rational mind, books and other resources from others who have studied) with which to make the mirror less dim in this life, we have no only the ability but the responsibility to make use of those means and to understand Him as well in this life as we possibly can. Don't be afraid to think really hard about God. He wants to be known.
Just because a mirror is dim doesn't make it virtuous to leave the mirror covered in dirt. Especially when you hold in your hand a rag and soapy water.
For further study: John 1:14, 18; Hebrews 1:1-4