To be unable to take his enemies, his misfortunes, and even his misdeeds seriously for long – that is the sign of strong, rounded natures with a superabundance of a power which is flexible, formative, healing and can make one forget (a good example from the modern world is Mirabeau, who had no recall of the insults and slights directed at him and who could not forgive, simply because he – forgot.) A man like this shakes from him, with one shrug, many worms which would have burrowed into another man; actual ‘love for your enemies’ is also possible here and here alone – assuming it is possible at all on earth.
Nietzsche, On the Genealogy of Morality