Why did jane refuse to the purposal of st.Jhon ?

"Although St. John does not love Jane, he believes that she would be suited to missionary work in India and thus, asks her to marry him. While Jane admits that she would gladly accompany him as his cousin (or adopted sister), marrying him under such circumstances would mean forfeiting her rights to a life of passion and love. Losing her autonomy in such a way is unacceptable to her, while accompanying him without marriage violates St. John's sense of propriety."

thaaaaaaaaaaaaaaaaanx

SHE REFUSED THE PROPOSAL BECAUSE SHE STILL LOVED ROCHESTER AND SECONDLY ONE DAY WHILE TALKING TO JOHN SHE HEARD ROCHESTERS VOICE CALLING HER NAME :p .....