Luke 11:40
Understand this: if the owner of the house had known at what hour the thief was coming, he would not have let his house be broken into — the thief-in-the-night image communicates the unpredictability of the hour rather than the nature of the coming. You also must be ready, because the Son of Man will come at an hour when you do not expect him. Unpredictability is not a problem to be solved but a condition to be inhabited through perpetual readiness.