What are you looking at?
"The light of the body is the eye: If therefore thine eye be single, thy whole body shall be full of light*. But if thine be evil, thy whole body shall be full of darkness. If therefore the light that is in thee be darkness, how great is that darkness!" (Matthew 6:22-23)
The whole of life boils down to a sort-of binary, if that makes sense. The simplicity of faith in Christ is maintained through all the hustle and bustle and busyness of life by "looking unto Jesus" (Hebrews 12:1). Binary, in the sense that there are all sorts of other places in which to invest our attentions. And yet, all the time, God is looking at us, straining to make eye contact. If thine eye be single...
Surely you've heard of Strabismus? It's painful just thinking about. Where both eyes are looking in opposite directions. I would say this plays into what Jesus was saying by keeping one eye on Him and the other, elsewhere. "If thy right eye offend thee, pluck it out, and cast it from thee..." (Matthew 5:29) But surely, it's not your eye's fault, is it? Is it.
The Urim and Thummim were essentially ancient dice the high priests used to help determine aspects of the will of God (this was prior to receiving the inner witness of the Holy Spirit). While "Urim" means "lights", "Thummim" refers to, not "dark", but "perfections".
"This then is the message which we have heard of Him, and declare unto you, that God is light, and in Him is no darkness at all. If we say that we have fellowship with Him, and walk in darkness, we lie, and do not the truth." (1 John 5-6)
And then David says this:
"Yea, though I walk through the valley of the shadow of death, I will fear no evil: for Thou art with me..." (Psalm 23:4, emphasis mine)
Did you ever wonder where God is? Out of all the points in space from which to tangentially look out into infinity, did you ever stop and think how God—from wherever He may be sitting right now—has connected with you? Food for thought. Thing is, He does it from within. Through Jesus and then the Holy Spirit. Or, not necessarily in that order? I don't know. I do know that if you have the slightest inkling of desire to connect with your Heavenly Father, He's already there. See, with reference to John and to David, walking in "darkness" all depends on the...not quantity, but quality of the light within us. If you have any light, any light* at all diffusing through your being, it's from God. The rods and cones in our retinas are sensitive down to one photon. One little point in the universe. That's pretty awesome. That's the connection. God's looking at you with eyes of love. Don't turn away.
Light. Dark. God wants to shine through you to reach the world. Know that wherever you find yourself, God is there with you. Ready to fill you with His light and love. And ready to send you out wherever you want to go! Don't kid yourself. It's challenging and rewarding in equal measure (more so the latter, if I may). It takes time but it's so worth it.
Forget to turn off the light(s)