My mind rebels at stagnation, give me problems, give me work!

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

There seems to me to be absolutely no limit to the inanity and credulity of the human race. Homo Sapiens! Homo idioticus!

As a rule, said Holmes, the more bizarre a thing is the less mysterious it proves to be. It is your commonplace, featureless crimes which are really puzzling, just as a commonplace face is the most difficult to identify.

No: I am not tired. I have a curious constitution. I never remember feeling tired by work, though idleness exhausts me completely." ~ Sherlock Holmes

The world is full of obvious things which nobody by any chance ever observes.

We must look for consistency. Where there is a want of it we must suspect deception.