I wasn't talking about reasons for grudges, but ways of holding grudges, how it is felt and expressed, that can be predicted via the enneagram. I am an angry person that stifles their anger until it can no longer be contained. Being rather pricipled, a gross violation of those principles incites me more quickly. I attribute this to the enneagram 1. And the way I hold the grudge is by making them pay, hurting them with equal force (or plotting to at least, that helps too sometimes). This is representative of the enneagram 4. Of course, my instinctual variants also play a role. Lady Jolanda had a nice overview in mind-map form somewhere about how this works, but I don't remember where. It must have been in one of the other enneagram threads.
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