“Even though PTSD [post-traumatic stress disorder] is triggered by a stressful incident, it is really of disease of memory. The problem isn’t the trauma–it’s that the trauma can’t be forgotten. Most memories, and their associated emotions, fade with time. But PTSD memories remain horribly intense, bleeding into the present and ruining the future.”
–Jonah Lehrer. “The Forgetting Pill.” Wired March 2012: 84-93, 120. Quote on page 87.