I too think the word you're looking for is "proof."
I think this is a nice idea for a song, and what images you do use are quite fitting, but at the same time I would have liked a bit more detail on what you were talking about... a bit more focus on reading, what it does, why it is your love...
Also, I'm going to be honest and admit that I think the ending is kind of weak... turning around at the end of a song and observing the fact that it's a song is kind of non-conclusive. Then again, I don't really know a lot about songwriting, so maybe you should just ignore me...
Nice writing, and thanks for contributing to Sanctuary.
God becomes as
we are that we
may be as he