We have found that guilt is a powerful force in many if not most people's lives. Watch for Lynn O'Conner and Jack Berry to post some of our groups research on prevalence and impact of guilt. I should have included it above as one of the causes and effects of trauma.
We have found that there are many types of guilt such as survivor guilt where one fears that the fact that one has done better than a loved one will end up injuring the loved one. Another kind is separation guilt- when one fears that to leave one's love one will cause them pain. Oedipal guilt is of course well known to all. Depletion guilt occurs when one fears that they have taken too much and depleted (hurt) a loved one. etc. Harold seems to have separation guilt but may also have other fears of his destructive powers.