"The ideal reasoner would, when he had once been shown a single fact in all its bearings, deduce from it not only all the chain of events which had preceded it but also all the ramifications which woul…"

"Data! Data! Data! I can't make bricks without clay."

"A man should keep his little brain attic stocked with all the furniture that he is likely to use, and the rest he can put away in the lumber-room of his library, where he can get it if he wants it."

"I have a trade of my own. I suppose I am the only one in the world. I’m a consulting detective, if you can understand what that is."

"The greatest gift that you can give to others is the gift of unconditional love and acceptance."