Quote by Sherlock Holmes
"It is my business to know what other people do not know."
More from Sherlock Holmes
"You see, but you do not observe. The distinction is quite clear."
"Data, data, data! I can't make bricks without clay."
"The world is full of obvious things which nobody by any chance ever observes."
"When you have eliminated the impossible, whatever remains, however improbable, must be the truth."