Read these lines from the passage.
Forgive me this my virtue:
For in the fatness of these pursy times
Virtue itself of vice must pardon beg,
Yea, curb and woo for leave to do him good. (Lines 71-74)
How is Hamlet's statement sarcastic?
He does not want to be forgiven when he has not forgiven himself.
He recognizes that his good qualities are the ones that offend others.
He argues that it is pointless to seek forgiveness when one is not sorry.
He says that in the current culture, virtuous people must now ask the
vile for forgiveness.