"Is it not? Is it not? Breadth of view, my dear Mr. Mac, is one of the essentials of our profession. The interplay of ideas and the oblique uses of knowledge are often of extraordinary interest." ~ The Valley of Fear
"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. A fool takes in all the lumber of every sort that he comes across, so that the knowledge which might be useful to him gets crowded out, or at best is jumbled up with a lot of other things, so that he has a difficulty in laying his hands upon it. Now the skillful workman is very careful indeed as to what he takes into his brain-attic. He will have nothing but the tools which may help him in doing his work, but of these he has a large assortment, and all in the most perfect order. It is a mistake to think that that little room has elastic walls and can distend to any extent. 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 Study in Scarlet
"But he had not that supreme gift of the artist, the knowledge of when to stop." ~ The Adventure of the Norwood Builder
His knowledge was greater than his wisdom, and his powers were far superior to his character. ~ The Leather Funnel
"When a doctor does go wrong he is the first of criminals. He has nerve and he has knowledge." ~ The Adventure of the Speckled Band
"Away, sir, away!" he cried, angrily. "Raise your mind above the base mercantile and utilitarian needs of commerce. Shake off your paltry standards of business. Science seeks knowledge. Let the knowledge lead us where it will, we still must seek it. To know once for all what we are, why we are, where we are, is that not in itself the greatest of all human aspirations? Away, sir, away!" ~ When the World Screamed
He smiled gently. "It is of the first importance," he said, "not to allow your judgment to be biased by personal qualities. A client is to me a mere unit, a factor in a problem. The emotional qualities are antagonistic to clear reasoning. I assure you that the most winning woman I ever knew was hanged for poisoning three little children for their insurance-money, and the most repellant man of my acquaintance is a philanthropist who has spent nearly a quarter of a million upon the London poor." ~ The Sign of The Four
"That which is clearly known hath less terror than that which is but hinted at and guessed." ~ The Hound of the Baskervilles
"Education never ends, Watson. It is a series of lessons with the greatest for the last." ~ The Adventure of the Red Circle
