“If I remember rightly, you on one occasion defined my limits in a very precise fashion.""Yes," [Watson] answered, laughing. "It was a singular document. Philosophy, astronomy, and politics were marked at zero, I remember. Botany variable, geology profound as regards the mudstains from any region within fifty miles of town, chemistry eccentric, anatomy unsystematic, sensational literature and crime records unique, violin player, boxer, swordsman, lawyer, and self-poisoner by cocaine and tobacco. Those, I think, were the main points of my analysis.”

“Dr. Watson's summary list of Sherlock Holmes's strengths and weaknesses:"1. Knowledge of Literature: Nil.2. Knowledge of Philosophy: Nil.3. Knowledge of Astronomy: Nil.4. Knowledge of Politics: Feeble.5. Knowledge of Botany: Variable. Well up in belladonna, opium, and poisons generally. Knows nothing of practical gardening.6. Knowledge of Geology: Practical but limited. Tells at a glance different soils from each other. After walks has shown me splashes upon his trousers, and told me by their colour and consistence in what part of London he had received them.7. Knowledge of Chemistry: Profound.8. Knowledge of Anatomy: Accurate but unsystematic.9. Knowledge of Sensational Literature: Immense. He appears to know every detail of every horror perpetrated in the century.10. Plays the violin well.11. Is an expert singlestick player, boxer, and swordsman.12. Has a good practical knowledge of British law.”

“It is cocaine," he said, "a seven-per-cent solution. Would youcare to try it?""No, indeed," I answered brusquely. "My constitution has not gotover the Afghan campaign yet. I cannot afford to throw any extrastrain upon it."He smiled at my vehemence. "Perhaps you are right, Watson," hesaid. "I suppose that its influence is physically a bad one. I findit, however, so transcendently stimulating and clarifying to themind that its secondary action is a matter of small moment.”

“My dear Watson," said [Sherlock Holmes], "I cannot agree with those who rank modesty among the virtues. To the logician all things should be seen exactly as they are, and to underestimate one's self is as much a departure from truth as to exaggerate one's own powers.”

“I could not rest, Watson, I could not sit quiet in my chair, if I thought that such a man as Professor Moriarty were walking the streets of London unchallenged.”

“Are they not fresh and beautiful?" [Watson] cried...Holmes shook his head gravely."... You look at these scattered houses, and you are impressed bu their beauty. I look at them, and the only thought which comes to me is a feeling of their isolation and of the impunity with which crime may be committed here... They always filled me with a certain horror. It is my belief, Watson... that the lowest and vilest alleys in London do not present a more dreadful record of sin than does the smiling and beauty of the countryside... But the reason is obvious. The pressure of public opinion can do in the town what the law cannot accomplish.”

“Should I ever marry, Watson, I should hope to inspire my wife with some feeling which would prevent her from being walked off by a housekeeper when my corpse was lying within a few yards of her.”