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.

Quote by Arthur Conan Doyle

Topics: Arthur Conan Doyle Quotes

Circumstantial evidence is occasionally very convincing, as when you find a trout in the milk,...

Circumstantial evidence is occasionally very convincing, as when you find a trout in the milk,...

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

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

For strange effects and extraordinary combinations we must go to life itself, which is always...

For strange effects and extraordinary combinations we must go to life itself, which is always...

From a drop of water a logician could infer the possibility of an Atlantic or...

From a drop of water a logician could infer the possibility of an Atlantic or...

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

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

To the man who loves art for its own sake, it is frequently in its...

To the man who loves art for its own sake, it is frequently in its...

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

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

It is an old maxim of mine that when you have excluded the impossible, whatever...

It is an old maxim of mine that when you have excluded the impossible, whatever...

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

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

The lowest and vilest alleys of London do not present a more dreadful record of...

The lowest and vilest alleys of London do not present a more dreadful record of...

Violence does, in truth, recoil upon the violent, and the schemer falls into the pit...

Violence does, in truth, recoil upon the violent, and the schemer falls into the pit...

There is nothing more unaesthetic than a policeman.

There is nothing more unaesthetic than a policeman.

My mind rebels at stagnation. Give me problems, give me work, give me the most...

My mind rebels at stagnation. Give me problems, give me work, give me the most...

Sir Walter, with his 61 years of life, although he never wrote a novel until...

Sir Walter, with his 61 years of life, although he never wrote a novel until...

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

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

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

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

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

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

The ideal reasoner, he remarked, would, when he had once been shown a single fact...

The ideal reasoner, he remarked, would, when he had once been shown a single fact...

I consider that a man's brain originally is like a little empty attic, and you...

I consider that a man's brain originally is like a little empty attic, and you...

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

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