Why do christians sing when they are together?

Why do christians sing when they are together? the reason is, quite simply, because in singing together it is possible for them to speak and pray the same Word at the same time; in other words, because here they unite in the Word. All devotion, all attention should be concentrated upon the Word in the hymn. The fact that we do not speak it but sing it only expresses the fact that our spoken words are inadequate to express what we want to say, that the burden of our song goes far beyond all human words. Yet we do not hum a melody; we sing words of praise to God, words of thanksgiving, confession, and prayer. Thus the music is completely the servant of the Word. It elucidates the Word in its mystery.