Shakespeare and Forgetting

What does it signify when a Shakespearean character forgets something or when Hamlet determines to ''wipe away all trivial fond records''? How might forgetting be an act to be performed, or be linked to forgiveness, such as when in The Winter''s Tale Cleomenes encourages Leontes to ''forget your evil. / With them, forgive yourself''? And what do we as readers and audiences forget of Shakespeare''s...