The inability to forgive is based on a flawed assumption: we mistakenly believe that anger and resentment can defend us against hurt feelings. But negative emotions don't protect us; they actually harm us, by unleashing a flood of stress hormones. So let go of the investment in this faulty strategy and focus instead on living as well as you can. And if you need a little mustard with your forgiveness, remember the words of Oscar Wilde, who quipped that you should always forgive your enemies because nothing annoys them more.