1 Samuel 17:38-39 (AMP) 38 Then Saul clothed David with his armor; he put a bronze helmet on his head and clothed him with a coat of mail. 39 And David girded his sword over his armor. Then he tried to go, but could not, for he was not used to it. And David said to Saul, I cannot go with these, for I am not used to them. And David took them off.
If we are going to defeat the Devil we have to do it with our own abilities and the help of God. We don’t have to do things like others to defeat the Devil. God will show us how to defeat the Devil in our own way. David did not need all of Saul’s armor to defeat the enemy, he just needed what he was used to using, his sling and his stone. We each have our own way to defeat the Devil so we cannot compare to how somebody else is working with what we are doing. We are each given certain gifts and abilities and we need to learn to work with what our capabilities are.
God has anointed you to be you, not somebody else.
1 Samuel 17:50 (AMP) 50 So David prevailed over the Philistine with a sling and with a stone, and struck down the Philistine and slew him. But no sword was in David’s hand.