What does the Bible say about true praise?

According to Psalm 138, true praise is an act that originates in the heart, reflecting a transformed spirit that acknowledges God's grace and mercy. David proclaims, 'I will praise Thee with my whole heart,' indicating that genuine worship is a matter of the heart rather than a mere outward display. God's true worshippers recognize their sinful state and rejoice in the salvation brought by Jesus Christ, leading them to offer heartfelt praise. As Charles Spurgeon aptly noted, we need a broken heart to mourn our sins but a whole heart to offer true praise to God.