I find it hard enough to tackle facts, Holmes, without flying away after theories and fancies."

"You are right," said Holmes demurely: "you do find it very hard to tackle the facts.

You have been in Afghanistan I perceive.

I'm not a psychopath, I'm a high-functioning sociopath. Do your research.

I had neither kith nor kin in England, and was therefore as free as air -- or as free as an income of eleven shillings and sixpence a day will permit a man to be. Under such circumstances, I naturally gravitated to London, that great cesspool into which all the loungers and idlers of the Empire are irresistibly drained.

They say that genius is an infinite capacity for taking pains," he remarked with a smile. "It's a very bad definition, but it does apply to detective work.

My name is Sherlock Holmes. It is my business to know what other people do not know.