You can have all the resources, all the people, but still fall. Why?
The prophecy emphasizes the immense military power assembled by both sides: a 'great army' from the north, and an 'exceedingly great and mighty army' from the south. It seems like a fair, or even favorable, fight for the king of the south on paper. Yet, he 'shall not stand.'
This reveals a crucial truth: numerical strength and material power don't guarantee victory. The prophecy implies that the southern king's downfall wasn't due to a lack of resources, but a failure to recognize or counter the 'plots' being hatched against him. True security and standing don't solely come from outward appearances or sheer force, but from inner integrity, wise counsel, and vigilance against deceit.