You never tire of the moor. You cannot think the wonderful secrets which it contains. It is so vast, and so barren, and so mysterious.

I am afraid that I rather give myself away when I explain," said he. "Results without causes are much more impressive.

…but it is better to learn wisdom late than never to learn it at all.

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.

Jealousy is a strange transformer of characters.

If in 100 years I am only known as the man who invented Sherlock Holmes then I will have considered my life a failure.

Crime is common. Logic is rare. Therefore it is upon the logic rather than upon the crime that you should dwell.