“There's a light in a woman's eyes that speaks louder than words.”

“Let me say right here, Mr. Holmes, that money is nothing to me in this case. You can burn it if it’s any use in lighting you to the truth. This woman is innocent and this woman has to be cleared, and it’s up to you to do it. Name your figure! My professional charges are upon a fixed scale, I do not vary them, save when I remit them altogether.”

“To Sherlock Holmes she is always the woman. I have seldom heard him mention her under any other name. In his eyes she eclipses and predominates the whole of her sex. It was not that he felt any emotion akin to love for Irene Adler. All emotions, and that one particularly, were abhorrent to his cold, precise but admirably balanced mind. He was, I take it, the most perfect reasoning and observing machine that the world has seen.... And yet there was but one woman to him, and that woman was the late Irene Adler, of dubious and questionable memory.”

“Could he throw no light?”

“Evil indeed is the man who has not one woman to mourn him.”

“Who knows, Watson? Woman's heart and mind are insoluble puzzles to the male.”

“He foresaw that she would be very much more useful to him in the character of a free woman.”