David being in great distress and danger by the malice of his enemies, does, in this psalm, by prayer address himself to God, his tried refuge, and seeks shelter in him. I. He appeals to God concerning his integrity (Psa 17:1-4). II. He prays to God still to be upheld in his integrity and preserved from the malice of his enemies (Psa 17:5-8, Psa 17:13). III. He gives a character of his enemies, using that as a plea with God for his preservation (Psa 17:9-12, Psa 17:14). IV. He comforts himself with the hopes of his future happiness (Psa 17:15). Some make him, in this, a type of Christ, who was perfectly innocent, and yet was hated and persecuted, but, like David, committed himself and his cause to him that judgeth righteously. A prayer of David.