Charles H. Spurgeon on Psalms 119:8

Forsake me not utterly. There is a total and a partial desertion. Those who are bent to obey God may for a while, and in some degree, be left to themselves. We cannot promise ourselves an utter immunity from desertion; but it is not total. We shall find for his great name's sake, "The Lord will not forsake his people" (1 Samuel 12:22), and, "I will never leave thee nor forsake thee" (Hebrews 13:5). Not utterly, yet in part they may be forsaken. Elijah was forsaken, but not as Ahab: Peter was forsaken in part, but not as Judas, who was utterly forsaken, and made a prey to the Devil. David was forsaken to be humbled and bettered; but Saul was forsaken utterly to be destroyed. Saith Theophylact, God may forsake his people so as to shut out their prayers, (Psalms 80:4), so as to interrupt the peace and joy of their heart, and abate their strength, so that their spiritual life may be much at a stand, and sin may break out, and they may fall foully; but they are not utterly forsaken. One way or other, God is still present; present in light sometimes when he is not present in strength, when he manifests the evil of their present condition, so as to make them mourn under it; and present in awakening their desires, though not in giving them enjoyment. As long as there is any esteem of God, he is not yet gone; there is some light and love yet left, manifested by our desires of communion with him. Thomas Manton.