Arthur Conan Doyle Quotes and Sayings

It is a capital mistake to theorize before one has data.

~Arthur Conan Doyle


I never guess. It is a shocking habit destructive to the logical faculty.

~Arthur Conan Doyle


I have frequently gained my first real insight into the character of parents by studying their children.

~Arthur Conan Doyle


His ignorance was as remarkable as his knowledge.

~Arthur Conan Doyle


Depend upon it there comes a time when for every addition of knowledge you forget something that you knew before. It is of the highest importance, therefore, not to have useless facts elbowing out the useful ones.

~Arthur Conan Doyle


I never guess. 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



Mediocrity knows nothing higher than itself, but talent instantly recognizes genius.

~Arthur Conan Doyle



You see, but you do not observe.

~Arthur Conan Doyle



There was something awesome in the thought of the solitary mortal standing by the open window and summoning in from the gloom outside the spirits of the nether world.

~Arthur Conan Doyle


It is a great thing to start life with a small number of really good books which are your very own.

~Arthur Conan Doyle



His ignorance was as remarkable as his knowledge.

~Arthur Conan Doyle



It is a capital mistake to theorize before one has data.

~Arthur Conan Doyle


There is nothing as deceptive as an obvious fact.

~Arthur Conan Doyle



Once you eliminate the impossible, whatever remains, no matter how improbable, must be the truth.

~Arthur Conan Doyle