Crime is commonplace, existence is commonplace, and no qualities save those which are commonplace have any function upon earth.
 Arthur Conan Doyle, The Sign of the Four (1890). copy citation

add
Author Arthur Conan Doyle
Source The Sign of the Four
Topic crime existence
Date 1890
Language English
Reference
Note
Weblink http://www.gutenberg.org/files/2097/2097-h/2097-h.htm

Context

“See how the yellow fog swirls down the street and drifts across the dun-coloured houses. What could be more hopelessly prosaic and material? What is the use of having powers, doctor, when one has no field upon which to exert them? Crime is commonplace, existence is commonplace, and no qualities save those which are commonplace have any function upon earth.” I had opened my mouth to reply to this tirade, when with a crisp knock our landlady entered, bearing a card upon the brass salver. “A young lady for you, sir,” she said, addressing my companion.” source