Ein feste Burg ist unser Gott (BWV 80): bass/soprano duet

We return to the Mighty Fortress cantata to do a deeper analysis on the theological counterpoint of this movement.  Bach combines two vocal parts -- one is Luther's hymn and the other is new poetry with Bach's own music -- and weaves both of those into a tapestry of staccato strings and marching bass.   Bach's theological profundity is what separates him from the other composers; when Bach weaves two separate texts together, he adds meaning to both by connecting their core essences together.

Netherlands Bach Society performing BWV 80 mvt 2