The punchline from a joke has gotten embedded in popular language: You can't get there from here. The original joke has a lost traveler stopping his car to ask a farmer how to get to a certain town. The farmer scratches his head and says, "You can't get there from here." the humor, of course, is rooted in the fact that you can get anywhere on the map from anywhere else.
One place where the punchline isn't funny refers to our minds. Everything the mind does is active. It takes the fluctuations of air molecules to create sound, which travels from the vibrating eardrum until the impulse is converted into electrical and chemical signals in the brain. All other information about the world "out there" depends on variations of the same model. Sight is possible through the interaction of photons with specialized cells in the retina. These in turn send electrical and chemical signals to the visual cortex. Without this activity, nothing in the universe is visible; photons by their nature are invisible.