When I was a teenager I read one book which describes similarity between neuronal cells in the human brain and cosmic network of galaxies. I was totally blown by this idea – the whole universe can be stored in each of us. And that's why we all so unlike – the world is the one, but for each of us it is different.
Much later I found one more similarity. Some ordinary objects around me could look like space objects – planets, galaxies, nebulas. Like this one – the sink drain in my apartment.