And that every tongue should confess that Jesus Christ is Lord, to the glory of God the Father.
Every tongue - cf. "every knee" (Philippians 2:10). In every way He shall be acknowledged х exomologeeseetai (G1843): 'openly confess'] as Lord (no longer "servant," Philippians 2:7; Matthew 28:18). As none can fully do so 'but by the Holy Spirit' (1 Corinthians 12:3), the spirits of good men dead must be the class directly meant, Philippians 2:10, "under the earth."
To the glory of God the father - the grand end of Christ's mediatorial office and kingdom, which shall cease when this end shall have been fully realized (John 5:19-23; John 5:30; John 17:1; John 17:4-7; 1 Corinthians 15:24-28). The Father's glory, and the Son's, is inseparable.