Joan Boney ... apostle/prophet
I Sam. 17 ...And Jesse said unto David his son, Take now for thy brethren an ephah of this parched corn, and these ten loaves, and run to the camp to thy brethren; 18And carry these ten cheeses unto the captain of their thousand, and look how thy brethren fare, and take their pledge. 19Now Saul, and they, and all the men of Israel, were in the valley of Elah, fighting with the Philistines. 20And David rose up early in the morning, and left the sheep with a keeper, and took, and went, as Jesse had commanded him;
We notice that David didn't go off on his own. He was following the instruction given him by his father. And before David went, he took measures to see that the sheep were cared for while he was gone.
Later his brother accused David wrongly of both matters.
His brother said to David ... I Sam. 17 ... And Eliab his eldest brother heard when he spake unto the men; and Eliab’s anger was kindled against David, and he said, Why camest thou down hither? and with whom hast thou left those few sheep in the wilderness? I know thy pride, and the naughtiness of thine heart; for thou art come down that thou mightest see the battle.
But David had simply done as his father commanded. And he had made arrangements for care of the sheep before he left.
When David heard these Philistines defying the armies of God and had seen the armies of God afraid and draw back, David was horrified.
David knew God with with him. David had experience with God. David knew what God could do.
And David said to Saul, Let no man’s heart fail because of him; thy servant will go and fight with this Philistine. 33And Saul said to David, Thou art not able to go against this Philistine to fight with him: for thou art but a youth, and he a man of war from his youth. 34And David said unto Saul, Thy servant kept his father’s sheep, and there came a lion, and a bear, and took a lamb out of the flock: 35And I went out after him, and smote him, and delivered it out of his mouth: and when he arose against me, I caught him by his beard, and smote him, and slew him. 36Thy servant slew both the lion and the bear: and this uncircumcised Philistine shall be as one of them, seeing he hath defied the armies of the living God. 37David said moreover, The LORD that delivered me out of the paw of the lion, and out of the paw of the bear, he will deliver me out of the hand of this Philistine.
I've seen the Word of God overcome in battles. I know when the word of God is revealed by the Holy Spirit we have the answer. Nothing will be able to overcome the revealed word of God.
Mt. 16 ... When Jesus came into the coasts of Caesarea Philippi, he asked his disciples, saying, Whom do men say that I the Son of man am? 14And they said, Some say that thou art John the Baptist: some, Elias; and others, Jeremias, or one of the prophets. 15He saith unto them, But whom say ye that I am? 16And Simon Peter answered and said, Thou art the Christ, the Son of the living God. 17And Jesus answered and said unto him, Blessed art thou, Simon Barjona: for flesh and blood hath not revealed it unto thee, but my Father which is in heaven. 18And I say also unto thee, That thou art Peter, and upon this rock I will build my church; and the gates of hell shall not prevail against it.
In this scripture, Jesus explains that God had revealed HIM to Peter. And that revelation from God was all powerful. The gates of hell will not be able to stand against that which God reveals to us.