In summa

I truly desire that all Christians would love and regard as worthy the lovely gift of music, which is a precious, worthy, and costly treasure given to mankind by God. The riches of music are so excellent and so precious that words fail me whenever I attempt to discuss and describe them...In summa, next to the Word of God, the noble art of music is the greatest treasure in the world. It controls our thoughts, minds, hearts, and spirits...Our dear fathers and prophets did not desire without reason that music be always used in the churches. Hence, we have so many songs and psalms. This precious gift has been given to man alone that he might thereby remind himself that God has created man for the express purpose of praising and extolling God.

Martin Luther, in his “Foreword” to Georg Rhau’s Symphoniae, published in 1538