Augustine says that we can help ourselves think about time if we start from the completeness of the whole - for example, the song that I undertake to sing from beginning to end. It, in itself whole, then unfolds in time. What kind of song is this? An early Christian hymn? Or human life? Or that praise of God, which turns out to be “the whole age,” totum saeculum, the history of the world? As with Aristotle, with Augustine we know time by the change of the soul: time is a changing soul, outside of which there is no measurement of time. This is not psychologism. The song that Augustine speaks of is essentially the same as the melody (tone) of presence, as Heidegger defines mood in his fundamental ontology.
Vladimir Bibikhin. "World"