Final answer:
Jane is comfortable speaking her mind to Mr. Rochester due to her boldness, honesty, and the intimate understanding and respect they have developed. Her comfort in self-expression is highlighted by the growth of mutual respect between them.
Step-by-step explanation:
Jane feels comfortable speaking her mind to Mr. Rochester for several reasons. The narrative shows that Jane's sense of honesty and bravery empowers her to express herself genuinely. This, coupled with her innate boldness and recognition of Rochester's imperfections—as well as his very human need for companionship and connection—fosters an environment where verbal expression feels both natural and necessary. Jane understands that communication goes beyond mere self-interest and is a means to build mutual respect and understanding. The transformation in Jane's character and self-perception across the text is significant as it highlights her developing confidence and the comfort she finds in sincerity.