What does Ephesians 6:24 mean?

As with many of his letters, Paul ends with the grace of God and the words, "Grace be with all who love our Lord Jesus Christ with love incorruptible." This "love incorruptible" is love that is pure and perfect. In a corrupt society, God's love could not be corrupted.

Grace is a driving theme in Paul's ministry and in this letter in particular. He begins with grace (Ephesians 1:2), teaches on grace (Ephesians 1:6, 7), notes salvation as being by God's grace (Ephesians 2:5, 7, 8; 3:2), calls himself a minister of God's grace (Ephesians 3:7, 8), teaches grace is given as a gift (Ephesians 4:7), words are to give grace to others (Ephesians 4:29), and ends here with giving grace to all believers.

Paul had personally experienced God's grace to receive salvation (Acts 9), and committed the rest of his life to communicating this wonderful plan of salvation (Romans 1:16) to others.