No one knows what will happen next. Like a fish caught in a net, or a bird caught in a trap, people are trapped by evil when it suddenly falls on them.
this is the kind of person who will be safe. He will be protected as he would be in a high, walled city. He will always have bread, and he will not run out of water.
That is why the Lord says: “Look, I am planning trouble against such people, and you won’t be able to save yourselves. You will no longer walk proudly, because it will be a terrible time.