Quote 40
The most racking pangs succeeded: a grinding in the bones, deadly nausea, and a horror of the spirit that cannot be exceeded at the hour of birth or death. (10.4)
Transforming between Dr. Jekyll and Mr. Hyde is not a smooth and seamless process, but rather immensely violent. This signifies the enormity of change that is occurring.
Quote 41
I was conscious, even when I took the draught, of a more unbridled, a more furious propensity to ill. It must have been this, I suppose, that stirred in my soul that tempest of impatience with which I listened to the civilities of my unhappy victim; I declare, at least, before God, no man morally sane could have been guilty of that crime upon so pitiful a provocation; and that I struck in no more reasonable spirit than that in which a sick child may break a plaything. But I had voluntarily stripped myself of all those balancing instincts by which even the worst of us continues to walk with some degree of steadiness among temptations; and in my case, to be tempted, however slightly, was to fall. (10.18)
Mr. Hyde has absolutely no scruples or morals; beating Sir Danvers to death is like a child breaking a plaything—an act of no consequence.
Quote 42
He came out of his seclusion, renewed relations with his friends, became once more their familiar guest and entertainer; and whilst he had always been, known for charities, he was now no less distinguished for religion. He was busy, he was much in the open air, he did good; his face seemed to open and brighten, as if with an inward consciousness of service. (6.1)
Dr. Jekyll’s good works involve religious service.