[36] But particular nature is of necessity unable to conduct what it belongs to to eternity; for want, or heat, or cold, or innumerable other ordinary circumstances, when they affect particular things, shake them and dissolve the bond which previously held them together, and at last break them to pieces; but if nothing resembling any of these things were lying in wait outside, then in that case nature itself, as far as it is possible, would preserve everything both great and small free from old age.