Arthur Conan Doyle

The love of books is among the choicest gifts of the gods.

When you have eliminated the impossible whatever remains however improbable must be the truth.

A trusty comrade is always of use, and a chronicler still more so.

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.

A client is to me a mere unit, a factor in a problem.

From a drop of water a logician could infer the possibility of an Atlantic or a Niagara without having seen or heard of one or the other.

The most difficult crime to track is the one which is purposeless.

For strange effects and extraordinary combinations we must go to life itself which is always far more daring than any effort of the imagination.

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

Circumstantial evidence is occasionally very convincing as when you find a trout in the milk to quote Thoreau's example.

Sir Walter with his 61 years of life although he never wrote a novel until he was over 40 had fortunately for the world a longer working career than most of his brethren.

His ignorance was as remarkable as his knowledge.

How often have I said to you that when you have eliminated the impossible whatever remains however improbable must be the truth?

Nothing clears up a case so much as stating it to another person.

As Cuvier could correctly describe a whole animal by the contemplation of a single bone so the observer who has thoroughly understood one link in a series of incidents should be able to accurately state all the other ones both before and after.

To the man who loves art for its own sake it is frequently in its least important and lowliest manifestations that the keenest pleasure is to be derived.

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.

We can't command our love but we can our actions.

When a doctor does go wrong he is the first of criminals. He has nerve and he has knowledge.

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

London that great cesspool into which all the loungers and idlers of the Empire are irresistibly drained.

Women are naturally secretive and they like to do their own secreting.

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

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.

My mind rebels at stagnation. Give me problems give me work give me the most abstruse cryptogram or the most intricate analysis and I am in my own proper atmosphere. But I abhor the dull routine of existence. I crave for mental exaltation.

The ideal reasoner he remarked would when he had once been shown a single fact in all its bearings deduce from it not only all the chain of events which led up to it but also all the results which would follow from it.

Any truth is better than indefinite doubt.

Where there is no imagination there is no horror.

I consider that a man's brain originally is like a little empty attic and you have to stock it with such furniture as you choose.

Of all ghosts the ghosts of our old loves are the worst.

The lowest and vilest alleys of London do not present a more dreadful record of sin than does the smiling and beautiful countryside.

There is nothing more deceptive than an obvious fact.

I have seen too much not to know that the impression of a woman may be more valuable than the conclusion of an analytical reasoner.

Violence does in truth recoil upon the violent and the schemer falls into the pit which he digs for another.

You will I am sure agree with me that... if page 534 only finds us in the second chapter the length of the first one must have been really intolerable.

It has long been an axiom of mine that the little things are infinitely the most important.

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

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

Some facts should be suppressed or at least a just sense of proportion should be observed in treating them.

Our ideas must be as broad as Nature if they are to interpret Nature.

There is nothing more unaesthetic than a policeman.

It is an old maxim of mine that when you have excluded the impossible whatever remains however improbable must be the truth.