The Lesson on Love
Guide to the canto
Dante emerges from the smoke of the third cornice, where sight returns slowly as when fog thins out in the mountains. The two pilgrims climb the staircase up to the fourth circle, where they stop, and the stars begin to appear as night approaches. Here the journey halts: it is the point at which Virgil can finally speak in an open place, far from the smoke.
Whom we meet
Only the angel of the fourth circle comes on the scene, who with a beat of wings erases a P from Dante's forehead and announces the beatitude of the peacemakers. Virgil takes on the role of master for the first time in this canto: he explains the structure of love, the true driver of the punishments that await them. Marco Lombardo, encountered in the previous canto, does not reappear.
What to expect
From here on love is the guiding thread: Dante will learn to distinguish right love from that which runs toward the good with a corrupted measure, through excess or defect. In the coming cantos he will meet the penitents who loved too much or too little, and a new face of moral error will take shape, no longer anger but desire out of season.
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Paraphrase