Know perfectly (akribw oidate). Accurately know, not "the times and the seasons," but their own ignorance. As a thief in the night (w klepth en nukti). As a thief at night, suddenly and unexpectedly. Reminiscence of the word of Jesus ( Matthew 24:43 ; Luke 12:39 ), used also in 2 Peter 3:10 ; Revelation 3:3 ; Revelation 16:15 . Cometh (ercetai). Prophetic or futuristic present tense.