[Lupin can't help his voice going gentle, now. He hopes it doesn't make Arthur feel undermined, but there are only so many ways he can deliver statements like this.]
In my world— [not even: the muggle world, but that's an unnecessary and uninteresting distinction right now] —we call it Post-Traumatic Stress Disorder. Or, when war-related, shell-shock. When someone's been through a truly terrible event, it's not uncommon for them to experience too-vivid memories of it, even flashbacks, both waking and asleep. Full-sensory flashbacks, sometimes: sights, smells, physical sensations; it can be fully enveloping.
With awareness, and willingness to confront and work through the memories, it can be a temporary condition. It will fade with time. And I believe it is not the same as madness, nor even a form of it. Even when, sometimes, we can't understand why it's connected to one particular event rather than another, or we believe it's a situation we've already dealt with to its… explicable limit.
voice
In my world— [not even: the muggle world, but that's an unnecessary and uninteresting distinction right now] —we call it Post-Traumatic Stress Disorder. Or, when war-related, shell-shock. When someone's been through a truly terrible event, it's not uncommon for them to experience too-vivid memories of it, even flashbacks, both waking and asleep. Full-sensory flashbacks, sometimes: sights, smells, physical sensations; it can be fully enveloping.
With awareness, and willingness to confront and work through the memories, it can be a temporary condition. It will fade with time. And I believe it is not the same as madness, nor even a form of it. Even when, sometimes, we can't understand why it's connected to one particular event rather than another, or we believe it's a situation we've already dealt with to its… explicable limit.