Memory, self-examination, and time › The elusive present

In XI.14, Augustine asks how familiar talk about time can be so difficult to explain. Past things have passed away; future things have not arrived. If the present never passed, it would resemble eternity rather than time. Yet if it passes, what exactly are we measuring when we call a time long or short?

He tests possible answers by dividing intervals. A present year contains months that have already passed and months still to come. A day contains earlier and later hours. Any extended interval considered this way contains succession rather than being wholly present at once (XI.15).

The exercise creates a difficulty rather than resolving it by declaring that nothing happens. We do measure durations and distinguish longer from shorter. Augustine wants an account that respects that practice while explaining what is available for measurement. A sound that has ceased cannot be heard again simply by pointing toward its vanished duration.

In XI.27, he turns toward the impression remaining in the mind after things pass. The proposed object of measurement is connected to that present impression. This is a move within his argument about measuring time, not a demonstration that physical processes cease when no one notices them. The stronger claim would require further argument.