I swear that I will tell you everything some day, but nothing but misery can come of it if you enter that cottage.
Woman's heart and mind are insoluble puzzles to the male.
I have seen death in many forms, but never has it appeared to me in a more fearsome aspect than in that dark grimy apartment, which looked out upon one of the main arteries of suburban London.
It was worth a wound—it was worth many wounds—to know the depth of loyalty and love which lay behind that cold mask.
We live in an age of utilitarianism. Honor is the medieval concept.
We give you best, Holmes. I believe you are the devil himself.
A wondrous subtle thing is love, for here were we two, who had never seen each other before that day, between whom no word or even look of affection had ever passed, and yet now in an hour of trouble our hands instinctively sought for each other.
There's the scarlet thread of murder running through the colourless skein of life, and our duty is to unravel it, and isolate it, and expose every inch of it.
The world is full of obvious things which nobody by any chance ever observes.
His ignorance was almost as remarkable as his brilliance.
It’s every man’s business to see justice done.
It is a mistake to confound strangeness with mystery. The most commonplace crime is often the most mysterious because it presents no new or special features from which deductions may be drawn.
But we hold several threads in our hands, and the odds are that one or other of them guides us to the truth. We may waste time in following the wrong one, but sooner or later we must come upon the right.
I knew that seclusion and solitude were very necessary for my friend in those hours of intense mental concentration during which he weighed every particle of evidence, constructed alternative theories, balanced one against the other, and made up his mind as to which points were essential and which immaterial.
This is all an insoluble mystery to me. It grows darker instead of clearer.