What does Psalm 108:12 mean?

Human rescue cannot compare to the absolute sovereignty of God. These words were originally written about a time when David was fighting with Ammonites to the north and the hostile nation of Edom launched a surprise attack (Psalm 60:1–5, 11). David was worried that the nation would fall, but he made up his mind to faithfully honor the Lord even in hard times. David knows that only divine power can achieve the victories he desires. Jesus remarked about the power of the Spirit when teaching His disciples (John 15:5).

A vivid example of the difference between human power and divine enablement came in the story of Samson. Though he did incredible things while under the influence of the Holy Spirit, his arrogance and self-confidence interfered (Judges 16:20). He was captured and blinded (Judges 16:21).