Quotations by Doyle, Arthur Conan


I have no data yet. It is a capital mistake to theorize before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts.

Arthur Conan Doyle (1859-1930) British writer and physician
“A Scandal in Bohemia” [Holmes] (1891)

Full text. Sometimes conflated with "No, no: I never guess. It is a shocking habit -- destructive to the logical faculty." from The Sign of the Four.
Added on 5-Nov-07 | Last updated 5-Nov-07
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A man should keep his little brain-attic stocked with all the furniture that he is likely to use, and the rest he can put away in the lumber-room of his library, where he can get it if he wants it.

Arthur Conan Doyle (1859-1930) British writer and physician
“The Five Orange Pips,” The Strand (Nov 1891)
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Added on 19-Jun-20 | Last updated 19-Jun-20
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The world is full of obvious things which nobody by any chance ever observes.

Arthur Conan Doyle (1859-1930) British writer and physician
The Hound of the Baskervilles, ch. 3 [Holmes] (1901-02)
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Added on 5-Oct-12 | Last updated 5-Oct-12
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When you have eliminated the impossible, whatever remains, however improbable, must be the truth.

Arthur Conan Doyle (1859-1930) British writer and physician
The Sign of Four, ch. 6, (Sherlock Holmes) (1889)
Added on 1-Feb-04 | Last updated 1-Feb-04
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When the spirits are low, when the day appears dark, when work becomes monotonous, when hopes hardly seems worth having, just mount a bicycle and go for a good spin down the road,
without thought of anything but the ride you are taking.

Arthur Conan Doyle (1859-1930) British writer and physician
In The American Bee Keeper (May 1895)
Added on 19-Nov-15 | Last updated 19-Nov-15
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