Commentary Par II 118-120

Perhaps it is best to follow Bosco/Reggio's interpretation of this difficult tercet (DDP Bosco.Par.II.118-120), which they understand in light of lines from [Purg XXX 109-110].  They argue that this tercet then means that the seven lower heavens (after the Primum Mobile and the Starry Sphere) dispose in diverse ways the various essences or powers that they receive from the Starry Sphere, adapting them to their own precise purposes.