Immensity of sweetness.
And the last illustration, in which the Pope hopes that Guido's soul may yet be saved by the suddenness of his death, is one of the finest pieces of natural description in Browning, and reads like one of his own memories:
I stood at Naples once, a night so dark
I could have scarce conjectured there was earth
Anywhere, sky or sea or world at all:
But the night's black was burst through by a blaze—
Thunder struck blow on blow, earth groaned and bore,
Through her whole length of mountain visible:
There lay the city thick and plain with spires,
And, like a ghost disshrouded, white the sea.