A.T. Robertson Commentary Matthew 25:13

"Watch therefore, for ye know not the day nor the hour." — Matthew 25:13 (ASV)

Watch therefore (γρηγορειτε ουν). This is the refrain with all the parables. Lack of foresight is inexcusable. Ignorance of the time of the second coming is not an excuse for neglect, but a reason for readiness. Every preacher goes up against this trait in human nature, putting off till another time what should be done today.