Aristotle, Physics Book II (Ch 1-3); Book III (Ch 1-3; 6-9)

Hence, for the purposes of proof, it will make no difference to them to have such an infinite instead, while its existence will be in the sphere of real magnitudes. In the fourfold scheme of causes, it is plain that the infinite is a cause in the sense of matter, and that its essence is privation, the subject as such being what is … ................
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