What can you tell me about Dr. Jekyll's childhood, education and ambition?
Chapter 10, "Henry Jekyll's Full Statement of the Case," is the chapter you want to re-read for more information as to his youth, growing up years, and ambitions. As he grew older he began thinking about a way to get rid of the evil side of people's nature, primarily due to what he considered the "duplicity" of his own nature - the desire to be serious and well-regarded in public life, but the equal desire to be silly and impetuous in private life. He thought that if he could get rid of the one, then he could help all people rid themselves of their bad sides:
"It was thus rather the exacting nature of my aspirations than any particular degradation in my faults, that made me what I was, and, with even a deeper trench than in the majority of men, severed in me those provinces of good and ill which divide and compound man's dual nature."
Again, please do a careful re-read of Chapter 10 as this will give you the information you need to answer this question. Good luck!