" Sherlock : You do yourself an injustice. The features are given to man as the means by which he shall express his emotions, and yours are faithful servants.

Watson : Do you mean to say that you read my train of thoughts from my features?

Sherlock : Your features, and especially your eyes. Perhaps you cannot yourself recall how you reverie commenced? "

― Arthur Conan Doyle , The Memoirs of Sherlock Holmes (Sherlock Holmes, #4)