Nature can never be completely described, for such a description of Nature would have to duplicate Nature.
No name can fully express what it contains.
It is Nature itself, and not any part (or name or description) abstracted from Nature, which is the ultimate source of all that happens, all that comes and goes, beings and ends, is and is not.
But to describe Nature as the «ultimate source of all» is still only a description, and such a description is not Nature itself. Yet since, in order to speak of it, we must use words, we shall have to describe it as «the ultimate source of all».