The Sin of a Great Man

I'd really prefer to avoid formalities, but they tend to be a necessary evil. My name is Evan, and I've been told I'm mad. It's a lie. Unless one calls a fiery passion for answering a question that has consumed your life insanity, then I'm not.
One may reason that my supposed condition invalidates this account, but I'm here to attest to the fact that it doesn't. The following stories have been gleaned from the whispers in dark alleys, the murmurings that our brains find too complicated to consider, and from the dusty recesses of the human mind where we keep our most unpleasant memories.
These are the sins of a great man.
These are the stories of Dr. Jekyll and Mr. Hyde.