The document discusses David's devotion to God and how it captured God's heart. It describes the cause of David's devotion as coming from meditating on God's law, knowing God, and experiencing God while tending sheep. It notes the object of David's devotion was God as savior, helper, and all-knowing. Evidence of David's devotion included trusting, being zealous for, and repenting before God. It concludes by stating how to capture God's heart through knowing his son Jesus, being transformed, and finding salvation by hearing, believing, repenting, confessing, and being baptized.