And lo! by slow degrees a smoke approached
In our direction, sombre as the night,
Nor was there place to hide one’s self therefrom.

This of our eyes and the pure air bereft us.

Purgatorio: Canto XVI

Darkness of hell, and of a night deprived
Of every planet under a poor sky,
As much as may be tenebrous with cloud,

Ne’er made unto my sight so thick a veil,
As did that smoke which there enveloped us,
Nor to the feeling of so rough a texture;

For not an eye it suffered to stay open;
Whereat mine escort, faithful and sagacious,
Drew near to me and offered me his shoulder.

E’en as a blind man goes behind his guide,
Lest he should wander, or should strike against
Aught that may harm or peradventure kill him,

So went I through the bitter and foul air,
Listening unto my Leader, who said only,
“Look that from me thou be not separated.”

Voices I heard, and every one appeared
To supplicate for peace and misericord
The Lamb of God who takes away our sins.

Still “Agnus Dei” their exordium was;
One word there was in all, and metre one,
So that all harmony appeared among them.