How does Jane Eyre demonstrate Brontë's imagination?

Charlotte Brontë's Jane Eyre is a good example of Brontë's imagination. Although spending time lost in her imagination went against Brontë's religious beliefs, she found that she couldn't help it, and she often lost herself in worlds such as those of Jane Eyre.
Brontë had no trouble creating a character similar to herself in terms of being able to easily use her imagination. In Jane Eyre, young Jane herself has an active imagination. Locked in the red room in her aunt's house, Jane becomes so convinced that she sees the ghost of her deceased uncle that she passes out. As she matures and goes to live with Mr. Rochester and his daughter, she often uses her imagination as a way to escape and to explore her own mind.
The fate of Bertha, Mr. Rochester's wife, is also the result of Brontë's imagination. Bertha is locked away in Thornfield, Mr. Rochester's house, because of mental illness. She eventually dies after throwing herself off of the roof of the house after setting it on fire.