It is not nonsense!
What does Luke 12:35-40 & 13:24-28 say?
Be dressed in readiness, and keep your lamps lit. Be like men who are waiting for their master when he returns from the wedding feast, so that they may immediately open the door to him when he comes and knocks. Blessed are those slaves whom the master will find on the alert when he comes; truly I say to you, that he will gird himself to serve, and have them recline at the table, and will come up and wait on them. Whether he comes in the second watch, or even in the third, and finds them so, blessed are those slaves.
But be sure of this, that if the head of the house had known at what hour the thief was coming, he would not have allowed his house to be broken into. You too, be ready; for the Son of Man is coming at an hour that you do not expect.
Strive to enter through the narrow door; for many, I tell you, will seek to enter and will not be able. Once the head of the house gets up and shuts the door, and you begin to stand outside and knock on the door, saying, Lord, open up to us! then He will answer and say to you, I do not know where you are from. Then you will begin to say, We ate and drank in Your presence, and You taught in our streets; and He will say, I tell you, I do not know where you are from; depart from Me, all you evildoers. In that place there will be weeping and gnashing of teeth when you see Abraham and Isaac and Jacob and all the prophets in the kingdom of God, but yourselves being thrown out.