Quotations from Dante - Pray for those in Purgatory

If a good word's said always there for us,
What should not here be done for them by prayers
From those whose will takes root where all good does?

Truly we ought to help them cleanse the smears
They carried hence, that, weightless and washed white,
They may fare forth and seek the starry spheres.

[Canto XI, 31-36]