The supply of matter in the universe was never more tightly packed than it is now, or more widely spread out. For nothing is ever added to it or subtracted from it. It follows that the movement of atoms today is no different from what it was in bygone ages and always will be. So the things that have regularly come into being will continue to come into being in the same manner; they will be and grow and flourish so far as each is allowed by the laws of nature.

Visible objects therefore do not perish utterly, since nature repairs one thing from another and allows nothing to be born without the aid of another's death.

this terror then and drakness of mind must be dispelled not by the rays of the sun and glittering shafts of day, but by the aspect and the law of nature; the warp whose design we shall begin with this first principle, nothing is ever gotten out of nothing by divine power.

There is no place in nature for extinction.