The psalmist's call to "love the LORD" isn't just an emotional plea; it's a logical response to God's proven character. Commentators explain that the verse gives two key reasons for this love: God "preserves the faithful" and "plentifully rewards the proud doer." This means God reliably protects those who trust in Him and ensures that pride and injustice ultimately face divine judgment. Our love for God is therefore grounded in His faithfulness and justice.