People have always wanted to know when the world will end. Jesus refuses to tell us. Not even the Son knows, he says, only the Father. Instead of a date, he gives a single instruction for everyone: watch.
Watching in his picture is not staring at the sky. It is servants getting on with the work they have been given, while the doorkeeper stays alert. The house runs as the master would want, because any moment he might walk through the door.
The Church year is drawing to a close, and the readings turn to the end of all things. That can sound frightening. Jesus means it to make us faithful. If the master came tonight, would he find us doing what he asked: loving, forgiving, praying, serving? That is what it means to be awake.