Believing that the gap is filled by mass media and materialism is an ideology too, it's a symptom. The crayon analogy I like because I think it's childish to think you can imagine what the true greatness of existence is. You can give expression to the feeling you have when you try to imagine, that's something else, but as soon as someone starts to fix an image, the gap of uncertainty is filled with that which hasn't been discovered yet and is taken for true. I think the most sane approach is to dare to leave open that which is unknown. That doesn't mean you can't have faith, but it does mean no personification, identification, or any kind of fixation of that which is uncertain.