What does it mean to serve the Lord with gladness?

To serve the Lord with gladness, as suggested in Psalm 100, is to engage in worship and service not out of obligation but from a place of joy and gratitude for all God has done. It signifies a willingness to be His servant, much like Christ, who exemplifies the greatest service through His sacrificial love. This glad service is motivated by our recognition of God's grace and mercy extended toward us. As we serve Him, we reflect His character to others and demonstrate our thankfulness for His unmerited favor.