The dispersal of languages at Babel (Gen 11) was reversed on Pentecost Day (the 50th day of Easter), when God caused the one Gospel of the Lord, Jesus Christ, to be preached in a multitude of languages. “At this sound the multitude came together” (Acts 2:6), for the preaching of Christ is the primary work of the Holy Spirit, whereby He gathers people from all nations into one Church. The Holy Spirit teaches and brings to our remembrance the words of Jesus, which are the words of the Father who sent Him. These words bestow forgiveness and peace to those who keep and hold on to them in love for Jesus. (John 14:27) This is why we sing.