So far as we are failing to see the light, we should be looking more towards the lampshade.
We should not be wearing the lampshade on our heads. We should not mistake it for the light. But we need to look for what light comes through. It is not a different light than we would find anywhere else, but it has much to say about opening our eyes.
My light lately has been largely through the scriptures of Stephen Gaskin. Not error-free, but much truth, as clean a truth as he could bring through. If you can see the light through that, it too is the only light there is, the same light you could find in the Bible. It is not a matter of who has "more" truth; it is a matter of how much you are able and willing to look.
Between him and Jesus, and some painfully illuminating recent experience (losing something I'd treasured and seeing what that revealed about me) I've been thinking I don't look so hot, and that I'll need some serious guidance and potentially inconvenient following to ever bear a closer look.