"No tongue can express, no mind can understand, how dreadful is purgatory.
Its pain is like that of hell; and yet (as I have
said) I see any soul with the least stain
of imperfection accept it as a mercy... ." -St. Catherine of Genoa, "Treatise on Purgatory", p. 23
"Purgatory" by Fr. François Schouppe (Imp. 1893)