Since the tragedy, I have been through many hours of therapy. I have enjoyed the devotion and kindness of friends, neighbors, coworkers, family members, and strangers. I also received an unexpected blessing. On a few occasions I was contacted by the parents of some of the children killed at the school. These courageous individuals asked to meet privately so we could talk. Their compassion helped me survive.

Still, Dylan's participation in the massacre was impossible for me to accept until I began to connect it to his own death. Once I saw his journals, it was clear to me that Dylan entered the school with the intention of dying there. And so, in order to understand what he might have been thinking, I started to learn all I could about suicide.

Suicide is the end result of a complex mix of pathology, character, and circumstance that produces severe emotional distress. This distress is so great that it impairs one's ability to think and act rationally. From the writings Dylan left behind, criminal psychologists have concluded that he was depressed and suicidal. When I first saw copied pages of these writings, they broke my heart. I'd had no inkling of the battle Dylan was waging in his mind. As early as two years before the shootings, he wrote about ending his life. In one poem, he wrote, "Revenge is sorrow / death is a reprieve / life is a punishment / others' achievements are tormentations / people are alike / I am different." He wrote about his longing for love and his near obsession with a girl who apparently did not know he existed. He wrote, "Earth, humanity, HERE. that's mostly what I think about. I hate it. I want to be free…free… I thought it would have been time by now. the pain multiplies infinitely. Never stops. (yet?) i'm here, STILL alone, still in pain…."

Among the items police found in his room were two half-empty bottles of Saint-John's-wort, an herb believed to elevate mood and combat mild depression. I asked one of Dylan's friends if he knew that Dylan had been taking it. Dylan told him he hoped it would increase his "motivation."

Each year there are approximately 33,000 suicides in the United States. (In Colorado, suicide is the second leading cause of death for people ages 15 to 34.) And it is estimated that 1 to 2 percent of suicides involve the killing of an additional person or people. I will never know why Dylan was part of that small percentage. I will never be able to explain or excuse what he did. No humiliating experience at school could justify such a disproportionate reaction. Nor can I say how powerfully he was influenced by a friend. I don't know how much control he had over his choices at the time of his death, what factors pushed him to commit murder, and why he did not end his pain alone. In talking with other suicide survivors and attempters, however, I think I have some idea why he didn't ask for help.

I believe that Dylan did not want to talk about his thoughts because he was ashamed of having them. He was accustomed to handling his own problems, and he perceived his inability to do so as a weakness. People considering suicide sometimes feel that the world would be better off without them, and their reasons for wanting to die make sense to them. They are too ill to see the irrationality of their thinking. I believe it frightened Dylan to encounter something he did not know how to manage, since he had always taken pride in his self-reliance. I believe he tried to push his negative thoughts away, not realizing that bringing them out in the open was a way to conquer them.