This is in the form of a fugue, with SATB chorus, or four voices. The first ascending subject is repeated 9 times - "Lobet den Herrn, alle Heiden." The second subject, "Und preiset in alle foelke," is repeated 13. Towards the end of this subject, we hear the tenor voice return to the original subject - there's two going on at once!! This recapitulation of the original subject is played 3 times. This abruptly stops, and there's a wonderful chorale at half the speed. It's like a nice time for the audience to catch their breath. More cadenzas are added, and the motet feels like it's speeding up again. The new subject, "In ewichkeit," is mostly a long note sung once in each voice - so it's performed only four times.
This ends, and we move into the complicated "Alleluja" section. The main subject in this section is performed 14 times, but only once by the soprano voice. Gradually all the voices come together for the terminative section. It ends on a full V-I, PAC cadence.