Commentary Par XIII 28-30

This part of the canto comes to a close with the souls turning their attention from their celebration of their Trinitarian God, in dance and song, to dealing with Dante's doubts, a process that also brings them pleasure.  They shift their attention from Dante's first question (rephrased at [Par XI 25]), now answered, to his second (see [Par XIII 89]).

This whole section has the characteristics of being an epitome of Dante's primary task as an artist, to mediate between the divine and the human.  God's immediate creation is gradually revealing itself to him, and he is putting it into art that we can understand, even if it is not precisely as His, but an approximation.