When the ark of the covenant of Yahweh came into the camp, all Israel shouted with a great shout, so that the earth rang again.
"Acquit yourselves like men, and fight"  (1 Samuel 4:9).  The conviction of the Philistines that they would now have to fight, not merely against the men of Israel, but also against "the god of their land," only challenged them to a more courageous and desperate attack against Israel.