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It's amazing because the whole premise of Christianity (and the story of the world) is fairly obvious - God was and is, he created the earth and everything in it, man chose to betray him, God spent a lot of time and energy trying to redeem him. God kind of has a corner on the market. He is the only true God. He could choose the straightforward way of revealing himself, but he doesn't. He chooses to be rather subversive. You could actually be face-to-face with him and not even know it. That's how under-the-radar God chooses to be.
Unbelievable, because we spend all this time trying to bring God to the surface for people, using his name a lot, building buildings supposedly in his honor, lobbying for what we think he might, and expanding our empires in his name. All the while, God is probably roaming the streets somewhere, rummaging through a trash can for some food.