Quote 7
I do not suppose that, when a drunkard reasons with himself upon his vice, he is once out of five hundred times affected by the dangers that he runs through his brutish, physical insensibility; neither had I, long as I had considered my position, made enough allowance for the complete moral insensibility and insensate readiness to evil, which were the leading characters of Edward Hyde. Yet it was by these that I was punished. (10.17)
Even Dr. Jekyll does not understand the depths of depravity Edward Hyde is capable of.
Quote 8
I resolved in my future conduct to redeem the past; and I can say with honesty that my resolve was fruitful of some good. You know yourself how earnestly, in the last months of the last year, I laboured to relieve suffering; you know that much was done for others, and that the days passed quietly, almost happily for myself. (10.21)
Dr. Jekyll tries in vain to atone for evildoing.
Quote 9
There comes an end to all things; the most capacious measure is filled at last; and this brief condescension to my evil finally destroyed the balance of my soul. And yet I was not alarmed; the fall seemed natural, like a return to the old days before I had made my discovery. It was a fine, clear, January day, wet under foot where the frost had melted, but cloudless overhead; and the Regent's Park was full of winter chirrupings and sweet with spring odours. I sat in the sun on a bench; the animal within me licking the chops of memory; the spiritual side a little drowsed, promising subsequent penitence, but not yet moved to begin. After all, I reflected, I was like my neighbours; and then I smiled, comparing myself with other men, comparing my active good-will with the lazy cruelty of their neglect. And at the very moment of that vainglorious thought, a qualm came over me, a horrid nausea and the most deadly shuddering. These passed away, and left me faint; and then as in its turn faintness subsided, I began to be aware of a change in the temper of my thoughts, a greater boldness, a contempt of danger, a solution of the bonds of obligation. I looked down; my clothes hung formlessly on my shrunken limbs; the hand that lay on my knee was corded and hairy. I was once more Edward Hyde. A moment before I had been safe of all men's respect, wealthy, beloved—the cloth laying for me in the dining-room at home; and now I was the common quarry of mankind, hunted, houseless, a known murderer, thrall to the gallows. (10.22)
Again, Stevenson elaborates on Jekyll as good and Hyde as evil—and the two living and fighting side-by-side in Jekyll’s psyche. Any semblance of balance is destroyed here in this passage.