There is no greater sorrow than to recall, in misery, the time when we were happy.
~Dante
Dante Alighieri on Amazon.com
Better by far you should forget and smile, than that you should remember and be sad.
~Christina Rossetti
The Complete Poems of Christina Rossetti
Things that were hard to bear are sweet to remember.
~Seneca
Seneca: Moral Essays, Volume I (Loeb Classical Library No. 214)
I shall remember while the light lives yet, and in the night time I shall not forget.
~Algernon Charles Swinburne
Major Poems and Selected Prose of Algernon Charles Swinburne