Gregory of Nyssa — as excerpted in the Catena Aurea on Luke 3:15-17

“(non occ.) But it is well to know, that the treasures, which according to the promises are laid up for those who live honestly, are such as the words of man cannot express, as eye hath not seen, nor the ear heard, nor hath it entered into the heart of man to conceive. And the punishments which await sinners bear no proportion to any of those things which now affect the senses. And although some of those punishments are called by our names, yet their difference is very great. For when you hear of fire, you are taught to understand something else from the expression which follows, that is not quenched, beyond what comes into the idea of other fire.”