"Detection is, or ought to be, an exact science and should be treated in the same cold and unemotional manner."

"There is no death, only a change of vibrations."

"The working classes need guidance, not revolution."

"A dog reflects the family life. Whoever saw a frisky dog in a gloomy family, or a sad dog in a happy one? Snarling people have snarling dogs, dangerous people have dangerous ones."

"You know my method. It is founded upon the observation of trifles."