Take heed, watch; for you do not know when the time will come. It is like a man going on a journey, when he leaves home and puts his servants in charge, each with his work, and commands the doorkeeper to be on the watch. Watch therefore — for you do not know when the master of the house will come, in the evening, or at midnight, or at cockcrow, or in the morning — lest he come suddenly and find you asleep. And what I say to you I say to all: Watch.” — Mark 13:33-37