The pathetic fallacy is a device where human emotions in a novel etc are reflected in the environment or landscape. Jane Eyre uses this device a lot - as we see in the first lines of the book, where it is very cold and unwelcoming outside, and Jane is relieved that it is too cold to go out with her cousins - ie the weather reflects the cold and unwelcoming family she lives in. You see the same idea when it turns very cold and snowy after her quarrel with her aunt; and most dramatically later in the novel, when Rochester proposes to her - it is a beautiful summer night, but suddenly the peace is shattered by a storm that splits the chestnut tree down the middle. This reflects the painful and dramatic events to come; and like the tree, Rochester (and the relationship) will be badly damaged but ultimately survive.
These are just a few examples. There are lots of others. Hope this helps.
These are just a few examples. There are lots of others. Hope this helps.