forgiving philosophy

The book explores forgiveness as a philosophical matter. Responding to the curious omission of forgiveness in much of Western philosophy, it examines common themes and divergences on forgiveness in the works of Augustine, Kierkegaard, and Arendt. These writers understood forgiveness as a paradox –it must be contained to be given (Augustine), granted-yet-not-granted (Kierkegaard), and forgotten the moment it is given, as if never given at all (Arendt).
Why has forgiveness been mostly ignored in Western philosophy? What does this omission reveal about Western thought? Should we, can we forgive philosophy for this oversight? Is philosophy meant to forgive and be forgiven? What does (a) forgiving philosophy look like?
Contemporary authors have argued for the (more or less imperative) need to (re)think what forgiveness is, the conditions under which it (supposedly) occurs (if it ever does), and its relation to justice (if any), since the inexpiable events of the past and present centuries maintain forgiveness an unresolved question.
Can forgiveness be then thought of as a hidden existential capacity and not as a magnanimous display of mercy? Can we imagine forgiveness as undoing the transgression we see, and secretly engaging with the imperceptible impossibility of undoing what has indeed been done?