what is time, what is poetry

For what is time? Who can easily and briefly explain it? Who even in thought can comprehend it, even to the pronouncing of a word concerning it? But what in speaking do we refer to more familiarly and knowingly than time? And certainly we understand when we speak of it; we understand also when we hear it spoken of by another. What, then, is time? If no one ask of me, I know; if I wish to explain to him who asks, I know not.

—Augustine of Hippo, Confessions, Book XI (ca. 400 CE)

For what is poetry? Who can easily and briefly explain it? Who even in thought can comprehend it, even to the pronouncing of a word concerning it? But what in speaking do we refer to more familiarly and knowingly than poetry? And certainly we understand when we speak of it; we understand also when we hear it spoken of by another. What, then, is poetry? If no one ask of me, I know; if I wish to explain to him who asks, I know not.