There must have been somewhat particularly animating when the trumpets were blown, which bid defiance to the enemy, but inspired courage to the Lord's people. We have a striking instance in the encouragement it gave Ahijah against Jeroboam: 2 Chronicles 13:12. The office of the priest was intended as encouraging also, because it promised the Lord's presence. See Deuteronomy 20:1-4.
Related Commentaries of Joshua 6:7
Joshua 6:7-8
7 And he said unto the people, Pass on, and compass the city, and let him that is armed pass on before the ark of the LORD.
8 And it came to pass, when Joshua had spoken unto the people, that the seven priests bearing the seven trumpets of rams' horns passed on before the LORD, and blew with the trumpets: and the ark of the covenant of the LORD followed them.