Robert Louis Stevenson, The Strange Case of Dr. Jekyll and Mr. Hyde.

Novel

Right and left, up and down, wide and narrow, love and hatred, soul and body, are a few examples of the dualities we observe in physical nature as well as in human nature. From Heraclitus to Hegel to Derrida, philosophers have used these categories—dichotomies, contraries, antitheses; and from Structuralism onward, binary oppositions—as a way of knowing.

Although thinkers like Hegel and Karl Marx attempted to shatter this established way of knowing with their thesis, antithesis, and synthesis, they did not get very far.

Robert Louis Stevenson in his novella The Strange Case of Dr. Jekyll and Mr. Hyde explores the duality of good and evil in us—human mortals

The writing is nervous and quirky, much apropos its theme; yet, exquisite. But what drew my attention, in this re-read, was Stevenson’s use of the “d” sound—throughout the book—to stir repulsion and revulsion.

Something displeasing, something down-right detestable. I never saw a man I so disliked, and yet, I scarce know why. He must be deformed somewhat.

And later he continues to pepper his prose with: dwarfish, disgust, troglodytic, decay, idol, diabolical, and divine. The author must have discovered that humans develop a visceral reaction to specific “d” sounds, but more than anything else to the odor of: danger, demise, demons, and death.

Masters of phonology channel the readers' emotions by the timely and precise use of specific sounds. Related sounds of disgust are "ch" words: Butch, bitch, scratch, croch, roach, and so on.