why does jane survive?

i think jane survives because from a very early age she has to learn how to endure mrs. reed and john. john being cruel to her and and mrs. reed having no compassion for her . i think this discipline is important for the rest of her life, the boarding school has the extremely unfair dean but she can survive it because she has learned how to cope with unfair people like john reed

“he bullied and punished me not two or three times in a week nor once or twice in the day but continually”