There is no greater sorrow Than to be mindful of the happy time In misery - Dante Alighieri

Ah, how cautiously a man should breathe
near those who see not only what we do,
but have the sense which reads the mind beneath

But if it is prose, it is prose of a previously unknown order, for the depth and multiplicity of mind that seem to function at every choice have not been matched in any piece of Western writing.

Like those who see so clearly while they dream that marks of feeling, when their dreaming ends, remain, though nothing more returns to mind, so I am now. For nearly all I saw has gone, even if, still, within my heart, there drops the sweetness that was born from that.