Answer:
What is it that no man ever yet did see, which never was, but always is to be?
A hill full, a hole full; yet you cannot catch a bowl full. What is it?
What kind of running means walking?
What begins and has no end? What is the ending of all that begins?
What always runs but never walks, often murmurs, never talks, has a bed but never sleeps, has a mouth but never eats?
I’m grown from darkness but shine with a pale light. Very round I am and always a lady's delight.