My name is Sherlock Holmes. It is my business to know what other people do not know.

It may be that you are not yourself luminous, but that you are a conductor of light. Some people without possessing genius have a remarkable power of stimulating it.

There is nothing more deceptive than an obvious fact.

"I have seen those symptoms before," said Holmes, throwing his cigarette into the fire. "Oscillation upon the pavement always means an affaire de coeur."

“How ever did you see that?” “Because I looked for it.”

Of all ghosts the ghosts of our old loves are the worst.

Jealousy is a strange transformer of characters.