“He has a gentle voice and a quiet manner, but behind his twinkling blue eyes there lurks a capacity for furious wrath and implacable resolution, the more dangerous because they are held in leash.”

“One night--it was on the twentieth of March, 1888--I was returning from a journey to a patient(for I had now returned to civil practice), when my way led me through Baker Street. As I passed the well-remembered door...I was seized with a keen desire to see Holmes again, and to know how he was employing his extraordinary powers. His rooms were brilliantly lit, and, even as I looked up, I saw his tall, spare figure pass twice in a dark silhouette against the blind. He was pacing the room swiftly, eagerly, with his head sunk upon his chest and his hands clasped behind him. To me, who knew his every mood and habit, his attitude and manner told their own story. He was at work again. He had risen out of his drug-created dreams and was hot upon the scent of some new problems.”

“It is a question of cubic capacity," said he; "a man with so large a brain must have something in it.”

“As he spoke, he whipped a tape measure and a large round magnifying glass from his pocket. With these two implements he trotted noiselessly about the room, sometimes stopping, occasionally kneeling, and once lying flat upon his face... As I watched him I was irresistibly reminded of a pure-blooded well-trained foxhound as it dashes backwards and forwards through the covert, whining in its eagerness, until it comes across the lost scent. For twenty minutes or more he continued his researches, measuring with the most exact care the distance between marks which were entirely invisible to me, and occasionally applying his tape to the walls in an equally incomprehensible manner.”

“(...) We are bound to go.”My answer was to rise from the table.“You are right, Holmes. We are bound to go.”He sprang up and shook me by the hand.“I knew you would not shrink at the last,” said he, and for a moment I saw something in his eyes which was nearer to tenderness than I had ever seen. The next instant he was his masterful, practical self once more.”

“They say that genius is an infinite capacity for taking pains," he remarked with a smile. "It's a very bad definition, but it does apply to detective work.”

“No man burdens his mind with small matters unless he has some very good reason for doing so.”