What does Psalm chapter 27 mean?
This psalm begins with David's expression of confidence in God as his source of joy and life, his deliverer, and protector. The first verse incorporates the concept of light. This was the Hebrew people's ideal for truth and goodness. David also depicts God as a fortress, or stronghold, meaning a place of safety and security. The question asked is rhetorical: there is no one who "should" frighten a person who trusts in God (Psalm 27:1).David lays out his reasons for confidence in God using several images. He believes God will protect him even if an army of malicious adversaries surround him. He longs to spend his life in worship in the tabernacle, where he can gaze on the Lord's beauty. He is certain the Lord will preserve him when trouble strikes. He will keep him safe on a high rock. The rock will serve as a fortress. He will once again offer sacrifices in the tabernacle, where he will sing joyfully to the Lord (Psalm 27:2–6).
At this point in the psalm, David's tone seems to change. After describing God's security so eloquently, he now fervently prays for rescue and deliverance. This is a very human, very normal experience. David "knows" he can trust God, but that knowledge does not make a person perfectly immune to fear. Rather than panicking or despairing, David reminds himself of God's goodness and trusts the Lord to provide. David remembers the Lord's command to seek His face, therefore he will seek the Lord (Psalm 27:7–8).
In his anxiety, David calls on the Lord not to forsake him. Still, he is confident that even if his own family were to desert him, God would not. David's writing often requests that God lead him into spiritual truth (Psalm 4:3; 25:5; 86:11). In this case, the language of those prayers also implies a request for physical safety. David's enemies—either Saul or David's rebellious son, Absalom—were lying in wait for him. He asks the Lord not to let his enemies have their way with him, and he says false witnesses have risen up against him (Psalm 27:9–12).
David concludes this psalm on a high note. He believes he will survive, so he encourages himself to wait on the Lord and to be strong and courageous. This last note of assurance might have been directed also at David's soldiers, or the people of Israel (Psalm 27:13–14).