The meaning here is formal before it is verbal: a passacaglia teaches attention by return. The vocal writing keeps coming back to an implied ground, and each return asks the listener to notice what has changed around the same center. That makes recurrence feel less like repetition than care.

Because the piece is made only from voices and silence, the shared body of the ensemble becomes the argument. Breath, attack, chord color, and withdrawal turn into architecture. The ending matters because the pattern stops speaking, but the ear still holds the form it learned through return.