Combining Texts

Ideas for 'fragments/reports', 'Knowledge and its Limits' and 'Two letters on mind'

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2 ideas

26. Natural Theory / A. Speculations on Nature / 5. Infinite in Nature

1748	Archelaus was the first person to say that the universe is boundless [Archelaus, by Diog. Laertius]
	Full Idea: Archelaus was the first person to say that the universe is boundless.
	From: report of Archelaus (fragments/reports [c.450 BCE]) by Diogenes Laertius - Lives of Eminent Philosophers 02.Ar.3

26. Natural Theory / A. Speculations on Nature / 7. Later Matter Theories / c. Matter as extension

16684	Impenetrability only belongs to the essence of extension [Descartes]
	Full Idea: It is demonstrated that impenetrability belongs to the essence of extension and not to the essence of any other thing.
	From: René Descartes (Two letters on mind [1649], More, Apr 1649), quoted by Robert Pasnau - Metaphysical Themes 1274-1671 15.5
	A reaction: I'm not sure that I understand how pure extension can be impenetrable.