You do see, you just don't observe.

— There's a woman lying dead.
— Perfectly sound analysis, but I was hoping you'd go deeper.

Dangerous to jump to conclusions.

— Don't staring.
— You're staring!
— We can't both stare.

That's the fraility of genius, John. It needs an audience.

— That's how you get your kicks, isn't it? You risk your life to prove you're clever.
— Why would I do that?
— Because you're an idiot.

Sherlock Holmes is a great man, and I think one day, if we're very, very lucky, he might even be a good one.

— This man got me off a murder charge.
— This is Angelo. Three years ago, I proved to Lestrade, at the time of a particularly vicious triple murder, that Angelo was in a different part of town, house-breaking.

— You had a row with a machine?
— Sort of. It sat there and I shouted abuse.

Look at you lot. You're all so vacant. Is it nice not being me? It must be so relaxing.

— Impossible to sustain a smoking habit in London these days. Bad news for brain.
— It's good news for breathing.
— Oh, breathing! Breathing's boring.

I don't eat when I'm working. Digesting slows me down.

— Anything else I can do? To assist you, I mean.
— Some silence right now would be marvellous.

When you have eliminated the impossible whatever remains must be the truth.

— Because you're an idiot. No, no, don't look like that. Practically everyone is.

People don't like telling you things. They love to contradict you.