Summary: God’s realm includes the physical world we live in, but it is much more that we can’t see. To understand what it means to live in God’s house, Paul uses different metaphors to show us what we can’t see.
Then Jesus told them, ”You are going to have the light just a little while longer. Walk while you have the light, before darkness overtakes you. Whoever walks in the dark does not know where they are going. Believe in the light while you have the light, so that you may become children of light.” When he had finished speaking, Jesus left and hid himself from them.
At night, if I have to get up to use the bathroom, there are all kinds of visual clues that help me navigate the dark room. The green glow from my wife’s digital clock. The pale light from the nightlight in the bathroom. The gentle yellow light peeking out from my alarm clock that says the alarm is “ON.” There is also a power strip on the floor beside my bed. I always know I am past the sharp edge of our bed frame when I can see the red light from the power cord switch.
All in all, there is a lot of light in our bedroom at night. If the power goes off, it is a very different story. Then all the lights in the house go out, and there is utter darkness. Not even any light from the street lights out front. Just blackness.
Walking around in that kind of dark is dangerous and slow.