We are born believing. A man bears beliefs as a tree bears apples.
I've actually apologized to some people I was a real jerk to, because I feel ashamed. I didn't need to be that hungry. There was something going on inside me when I was angry and feeling very threatened and not feeling good about myself.
In the context of general relativity, space almost is a substance. It can bend and twist and stretch, and probably the best way to think about space is to just kind of imagine a big piece of rubber that you can pull and twist and bend.
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