[983a]
let us first consider their great size. For they are not actually those small things that they appear to be, but each of them is immense in its bulk; we should do well to believe this, because there are ample proofs of such a conclusion. For we can rightly consider the whole of the sun as larger than the whole of the earth, and all the travelling stars are of amazing size. Let us conclude then whether it can possibly be that any natural force revolves this great mass that is now being revolved, continually and at the same time.
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