Psalm 33 is one of those happy Psalms about singing joyfully to God because he made us and he made the universe. Furthermore he is dependable, faithful and true to those who put their trust in him. He loves righteousness and justice. He keeps watch over those who fear him.
So while we wait in hope for the Lord, we sing (even if it is a joyful noise) and we pray, "May your unfailing love rest upon us, O Lord, even as we put our hope in you."