Of course, not many people know that inner demons are far worse than outer demons. You can always find a way to defeat physical beings, Sherlock. It's easy. And boring. But eventually, even the physical demons fester themselves inside your head, slowly eating away at your sanity bit by bit until one of three things happens. One: you finally beat the demons and walk away relatively unscathed. It won't bother you anymore and you'll live a nice happy life knowing that you can defeat anything that comes your way. This will never happen to you Sherlock, you demons are just too large to defeat. Two: the demons break free and consume you. You break. Maybe, if you're lucky, you'll die, but most people don't. They continue existing, but it's just that: existing. They eat and breathe and walk and talk, but they don't live a happy life. They are broken shells that will never be whole again. Going the motions, but it's incredibly dull. Nice and cheerful, isn't it? The third option, my personal favorite, is that you embrace all of your demons. Let them become part of you. Absorb your demons and change everything; your mind, your personality, your whole life. Let the madness consume you until nothing good is left. Become a horrible villain that people fear is hiding under their bed. Drench yourself in the blood of everyone who thought that they had broken you, everyone who ever contributed to every demon you have been trying to fight. It's quite fun. Really, it is. Once you embrace your demons, your conscience takes a back seat, and you cease to become human. Become a monster. Become someone that everyone fears.
Become Me, Sherlock.
Because I am you. Only you're boring, you're on the side of the angels, Sherlock. You're an angel fighting those demons in your head, the ones that nobody knows about, and no one ever will. You hide everything far too well for them to know just how close you are to breaking; that every death you could have prevented weighs on you, every unsolved crime leads to more death that you couldn't prevent. You pretend not to care because if you let yourself care, you would break apart. You fight the demons, keep them locked up in a straitjacket inside of you precious mind palace. Well, jokes on you Sherlock Holmes, because no matter how hard you try, monsters can't stay hidden under the bed forever! And I'm not letting you free until you
Become
Me.
Of course, when you do break-and you will-we'll need a new name for you, because you won't be Sherlock Holmes anymore, oh no. You'll be my first mate, someone who will almost be as intelligent as me. What name would you want Sherlock? Ooh, I've got one! After I break you, you'll be my live-in pet: Sebastian Moran.