"I confess to you, Lord, that I still do not know what time is, and I further confess to you, Lord, that as I say this I know myself to be conditioned by time. For a long period already I have been speaking about time, and that long period can only be an interval of time. So how do I know this, when I do not know what time is? Perhaps what I do not know is how to articulate what I do know. My condition is not good if I do not even know what it is I do not know."
- St. Augustine of Hippo, Confessions