It is as dangerous for people unaccustomed to handling words and unacquainted with their technique to tinker about with these heavily-charged nuclei of emotional power as it would be for me to burst into a laboratory and play about with a powerful electromagnet or other machine highly charged with electrical force.

When cats sat staring into the fire they were thinking out problems.

But to Lord Peter the world presented itself as an entertaining labyrinth of side-issues

Detective stories keep alive a view of the world which ought to be true. Of course people read them for fun ... But underneath they feed a hunger for justice ... you offer to divert them, and you show them by stealth the orderly world in which we should all try to be living.

One must not only die daily, but every day we must be born again.

the truth and value of a theory does not depend on the number of people who are interested in it - otherwise you might compare the number of people who follow the predictions of astrologers in the daily press with those who attend lectures by Einstein, and conclude that astrology was more valuable and true than physics.

I know what you're thinking - that anybody with proper sensitive feelings would rather scrub floors for a living. But I should scrub floors very badly, and I write detective stories rather well. I don't see why proper feelings should prevent me from doing my proper job.