I'm not a psychopath, I'm a fully functioning sociopath. Do your research.

Ex-Professor Moriarty of mathematical celebrity... is the Napoleon of crime, Watson.

Circumstantial evidence is a very tricky thing. It may seem to point very straight to one thing, but if you shift your own point of view a little, you may find it pointing in an equally uncompromising manner to something entirely different

You are my heart, my life, my one and only thought.

The ways of fate are indeed hard to understand. If there is not some compensation hereafter, then the world is a cruel jest.

The grand thing is to be able to reason backwards.

A fine horse or a beautiful woman, I cannot look at them unmoved, even now when seventy winters have chilled my blood.