Judges 7:17 And he said unto them, Look on me, and do likewise: and, behold, when I come to the outside of the camp, it shall be that, as I do, so shall you do.
Thus, in harmony with the rules of spiritual warfare, he grabs his trumpet, and he and his 300 men begin to play music and sing praises to God. Pay very close attention to what happens next. Judges 7:18 When I blow with a trumpet, I and all that are with me, then blow you the trumpets also on every side of all the camp, and say, The sword of the Lord, and of Gideon.
Judges 7:19 So Gideon, and the hundred men that were with him, came unto the outside of the camp in the beginning of the middle watch; and they had but newly set the watch: and they blew the trumpets, and broke the pitchers that were in their hands. 20 And the three companies blew the trumpets, and broke the pitchers, and held the lamps in their left hands, and the trumpets in their right hands to blow withal: and they cried, The sword of the Lord, and of Gideon.
Judges 7:21 And they stood every man in his place round about the camp; and all the host ran, and cried, and fled. 22 And the three hundred blew the trumpets, and the Lord set every man's sword against his fellow, even throughout all the host: and the host fled to Bethshittah in Zererath, and to the border of Abelmeholah, unto Tabbath.
1st Corinthians 3:18 Let no man deceive himself. If any man among you seemeth to be wise in this world, let him become a fool, that he may be wise. 19 For the wisdom of this world is foolishness with God. For it is written, He taketh the wise in their own craftiness.
May The Lord add His blessing to the study of His word. God bless!