it's a servant of the king that didn't do his job (he sinned). so he asks the king to forgive him. the king forgives him. but the servant still feels guilty. "Although my King has shown me mercy how come I can't forgive myself? For the crime I have committed I should have been punished by death." he knows he should have had to die. and death is not just death. "that their deaths were merely an illusion". there's more after death, it's not over.
it's a servant of the king that didn't do his job (he sinned). so he asks the king to forgive him. the king forgives him. but the servant still feels guilty. "Although my King has shown me mercy how come I can't forgive myself? For the crime I have committed I should have been punished by death." he knows he should have had to die. and death is not just death. "that their deaths were merely an illusion". there's more after death, it's not over.