Reflect often upon the rapidity with which all existing things, or things coming into existence, sweep past us and are carried away.
Nothing proceeds from nothingness, as also nothing passes away into non-existence.
Even while a thing is in the act of coming into existence, some part of it has already ceased to be.
Some things are hurrying into existence, and others are hurrying out of it; and of that which is coming into existence part is already extinguished