So That We Might Keep Watch

Ephrem the Syrian, writing in the fourth century, made some of the same points I've made about early Christian eschatology. He doesn't limit the units of time that aren't known in Mark 13:32 to smaller ones, but takes them to include larger ones, like the generational timeframe, as well. He cites Acts 1:7 in the process, as I've often done. He refers to how Jesus is communicating the fact that all generations are to be on watch. He refers to how there are some general signs of the times that are in place in every generation, a point I've often made:

He also said, But, of that hour no one knows, not even the angels, nor the Son [Matthew 24:36], lest they question him as to the moment of his coming. It is not your business to know the days and the times. [Acts 1:7] He has hidden that [from us] so that we might keep watch, and that each of us might think that this coming would take place during our life. For, if the time of his coming were to be revealed, his coming would be in vain, and it would not have been desired by the nations and the ages in which it was to take place. He has indeed said that he will come [cf. Matthew 24:30], but he did not define when, and [thus] all generations and ages thirst for him. For, although he has given [an indication of] the signs of his coming, their end cannot be understood, since they have come and gone in a constant flux and yet they remain always....

Or perhaps he knew the time but the moment was hidden from him? But the time is a moment, and a moment is part of time....

He highlighted his signs so that, from the first day, all peoples and ages would think that his coming would take place in their day.

(Carmel McCarthy, trans., Saint Ephrem's Commentary On Tatian's Diatessaron [New York: Oxford University Press, 2000], 18:15-16; pp. 278-80)