this is the only one I have trouble with............

I understand your confusion, and attempts to wrap my head around it leave me with a headache sometimes as well.As far as "there must have been God to cause it" though... that never flew with me. After all, if the explanation is "An incomprehensible being waved his or her hand, causing everything to form", well... then everything still just kind of popped out of nowhere, at least for all intents and purposes.Contrarily... let's say we finally completely understand God. What he is, how he did what he did, etc. The same questions remain, but applied higher up. What was around before God? How did God simply form out of nothing? Did someone make God?As far as I'm concerned, bringing up God just moves the goalposts a little, and leaves the questions right where they are. It doesn't present a simpler explanation, but actually a much more complex and unlikely one.------------------
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Dan Carroll

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does the universe end? if so what would the end look like? I understand what you are talking about but things can't just always be there can they? and how can someone say the Univese is Expanding when we don't know if it even ends?

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Hoof. This one does my head in too. One time I freaked out looking at the night sky.It gets worse when you hear a few theoretical physics notions. Try picturing the universe as not only existing as a single object in space, but in time as well. One giant structure already laid out in four dimensions. Even once you get past the mental gymnastics it would take to even conceive of the shape of the universe at that point, you start worrying about free will...
AHHHHHHHHH indeed.A giant, blob-like catepillar is the closest I can come to picturing it, and even that's reducing it to the concept of time I already experience...------------------
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Dan Carroll