Surely one of the greatest gifts the Lutheran church ever gave to music was to have charged Bach with the duty of producing a cantata for every week of the year. He left us no fewer than three for the first Sunday in Advent alone, composed between 1714 (at Weimar) and 1724-31 (at Leipzig). They are inspired in very different ways by Luther's original chorale: it is as if all of Baroque Germany is contained between the sobriety of 'BWV 61' and the ambitious frescoes of 'BWV 36' and '62'.

