Be sober, be vigilant; because your adversary the devil, as a roaring lion, walketh about, seeking whom he may devour

Whom resist stedfast in the faith, knowing that the same afflictions are accomplished in your brethren that are in the world. – 1 Peter 5:6-11

But know this, that if the goodman of the house had known in what watch the thief would come, he would have watched, and would not have suffered his house to be broken up.

Matthew 24:42-44