27:7-10 Apparently David was not getting the help he needed so he appealed earnestly to the Lord. In the Mosaic Law, God told His people to remember Him and to draw near to Him rather than abandoning Him. David was doing just that so he asked God not to abandon him or remain silent when he requested deliverance. He reminded the Lord that he was His servant because lords did not normally deny their servants access to their presence. God could reject David's plea because he was a sinner so the psalmist acknowledged the possibility that God would turn him away.
Verse 10 should probably be a conditional statement: "If my father . . . ."David's point in this verse was that even if those who were most supportive of him on earth would forsake him he knew even then that the Lord would not abandon him.
27:11-12 David needed directions from God since his enemies were trying to catch him. He feared they would falsely condemn him if the Lord allowed him to fall into their hands.
27:13-14 David's confidence in God returned, and he rejoiced in the prospect of the Lord's deliverance. He encouraged himself and his readers to wait for that salvation and to strengthen themselves with faith in God.
Believers can remain positive and confident about our spiritual safety as we find our delight in the Lord. When fear raises its head, the way to defeat it is to return to trust in Yahweh.76