What does Psalm chapter 17 mean?
Psalm 17 shares several phrases and themes with Psalm 16. A key difference is this psalm's sense of urgency. David's prayer here seems more desperate than the pensive words of Psalm 16. This is one of the psalms specifically labeled as a "prayer," also including psalms 86, 90, 102, and 142. Likely, this was composed when David was being hunted and persecuted by the evil king Saul (1 Samuel 20:32–33).David begins with an intense plea for deliverance. Much of this revolves around a profession of innocence. Knowing that God is not inclined to grant requests from evil people (Psalm 66:18–19), David points out that he is sincerely and consistently following God. This includes both David's outward actions and his inner thoughts (Psalm 17:1–5).
The next section focuses on the nature of God's protection. David expresses deep trust that God not only hears, but also that He will answer when David prays. David asks to be held with tender protection, using two phrases famous even outside of Scripture. What English translators often render as "the apple of your eye" is literally a reference to the pupil: the central spot of the eyeball. This is arguably the most closely protected part of our body, guarded from even the slightest touch. In a similar way, David appeals to the image of a mother bird using her wings to shield her children (Psalm 17:6–8).
Those whom David seeks to escape are depicted as arrogant and merciless, like predatory animals. In this segment, David shifts to asking for "our" deliverance, likely including his companions (1 Samuel 22:1–2). At the same time, his prayer shifts to mention a singular enemy, likely Saul. While David sees his "portion" as God (Psalm 16:5–6), he knows those who reject God have nothing to look forward to beyond this life. Their "portion" is only in this temporary world. David, on his part, expects to see God's face and be satisfied (Psalm 17:9–15).