"The eye is the lamp of the body. If your eyes are good, your whole body will be full of light. But if your eyes are bad, your whole body will be full of darkness. If then the light within you is darkness, how great is that darkness!" Matthew 6:22-23
Just in case anyone is wondering, this actually has nothing to do with your eyes. Just because you were coke bottle glasses doesn't mean you walk in darkness.
Moving on...the body finds its way because of the eye, right? Yes, you can slowly walk through a dark room using your hands and feet to feel around you, but isn't it a million times easier when the light is turned on? Of course it is. When your eyes are working, light is provided to the body to go where it should go and stay away from those places it should stay away from.
Similarly, in a spiritual way, the heart tells the rest of you where you should go and where you shouldn't. If your heart is illuminated by the Light of Christ, then you will go where you the Spirit moves you. However, if your heart is not illuminated by the Light of Christ, then, even if you think you're on the right track, you're most likely way off.
This reminds me of something that happened a few months ago. My wife, Sarah, recently bought some glasses for driving. She's always been supposed to wear glasses to drive, but most of the time has just squinted her way through it (doesn't that make you feel safe?) and managed to be a pretty good driver without any glasses. Once she got her glasses, though, she was amazed at how clear everything was. Before, she could see what she needed to see, but after, she could see so much more, kind of like upgrading to HDTV (so I'm told...I've never seen anything on HDTV).
May your heart be illuminated today by the Light of Christ, and may His Spirit move you to the places you need to be.