“The most difficult crime to track is the one which is purposeless.”

The devil’s agents may be of flesh and blood, may they not?

To a great mind, nothing is little.

Critics kind never mind! Critics flatter no matter! Critics blame all the same! Do your best damn the rest!

His Ignorance was as remarkable as his knowledge.

As a rule, the more bizarre a thing is, the less mysterious it proves to be.

A dog reflects the family life.

Some people’s affability is more deadly than the violence of coarser souls.

No man burdens his mind with small matters unless he has some very good reason for doing so.

The world is full of obvious things which nobody by any chance ever observes.

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

For strange effects and extraordinary combinations we must go to life itself, which is always far more daring than any effort of the imagination.

I dislike my fellow-mortals. Justice compels me to add that they appear for the most part to dislike me.

Love is an emotional thing, and whatever is emotional is opposed to that true cold reason which I place above all things.

There is no scent so pleasant to my nostrils as that faint, subtle reek which comes from an ancient book.

The unexpected has happened so continually in my life that it has ceased to deserve the name.

The emotional qualities are antagonistic to clear reasoning.