Ay, thou poor ghost, while memory holds a seat
In this distracted globe. Remember thee!
Yea, from the table of my memory
I’ll wipe away all trivial fond records.

– William Shakespeare

Hamlet, Act 1, Scene 5. Hamlet feels sorry for the Ghost, his father, whose soul is condemned to Purgatory because he was unable to repent his sins before he died. He pledges that he will avenge his death.