The WordOfTheLord accomplishes its purpose. Once the Lord has spoken, He watches it perform its purpose.

If we look forward in Jeremiah`s time line, we see men from the north and east exercising their military strength to bring to pass the prophecies.

Men accomplish the WordOfTheLord by their words and actions. -> If their words echo the WordOfTheLord and their actions are actions of obedience, there is victory. -> If otherwise, there is defeat.