Jekyll was becoming too old to act upon his more embarrassing impulses, but Hyde was a younger man, the personification of the evil side that emerged several years after Jekyll’s own birth.Transforming himself into Hyde became a welcome outlet for Jekyll’s passions.
As Hyde, he immediately felt brave and powerful, but he also knew that the police would seize him for his murder of Carew.
This incident convinced him that he must cease with his transformations or risk being trapped in Hyde’s form forever.
But after two months as Jekyll, he caved in and took the potion again.
When his scientific interests led to mystical studies as to the divided nature of man, he hoped to find some solution to his own split nature.
Jekyll insists that “man is not truly one, but truly two,” and he records how he dreamed of separating the good and evil natures.
It was not until two months before the Carew murder that Jekyll found cause for concern.