Psalms 33:1
1Rejoice in the LORD, you righteous! Praise is fitting for the upright.
Shout for joy in the LORD, you righteous! Praise is fitting for the upright. The forgiven of Psalm 32 are summoned into fitting praise: joy in the LORD belongs with upright hearts, not as a performance of the self-made.
Let the righteous shout. Do not treat praise as optional garnish; it befits those the LORD has made upright in heart.
Calvin: the inspired writer addresses believers or the righteous by name, because they alone are capable of proclaiming God's glory from the heart. Praise is comely for the upright—no exercise in which they can be better employed; God by daily benefits furnishes matter for celebrating his glory.
Rejoice in Jehovah as the upright. Let integrity of heart and public praise travel together; refuse a mute righteousness that never publishes his goodness.