"I add: in all this world, no thing can keep
its form. For all things flow; all things are born
to change their shapes. And time itself is like
a river, flowing on an endless course.
Witness: no stream and no swift moment can
relent; they must forever flow; just as
wave follows wave, and every wave is pressed,
and also presses on the wave ahead;
so, too, must moments always be renewed.
What was is now no more; and what was not
has come to be; renewal is the lot
of time." (15.177-185)