“… of the Lord” is a vital, pivotal and essential part to the life of a Christian.
There’s the joy of the Lord (Matthew 25:23). There’s the servant of the Lord (2 Timothy 2:24). There’s the name of the Lord (Proverbs 18:10). There’s the Spirit of the Lord (2 Corinthians 3:17). And there’s undoubtedly the salvation of the Lord (Exodus 14:13).
Whatever the “of the Lord” it may be, the “of the Lord” for the Christian is there so we can be ready for the great “day of the Lord” (1 Corinthians 1:8) and this fact is meant to remind us about the importance of telling the world about the great “invitation of the Lord” (Matthew 11:28-30).