Loving hate, heavy lightness, cold fire, and sick health are all examples of oxymoron.
Jem ages from 10-13 over the course of "To Kill A Mockingbird", which has brought a great change in any child's life. The changes he had went through has been seen from the point-of-view of his younger sister. He has represented an idea of bravery in the novel. In the beginning of the novel, Jem thinks bravery is touching the side of the Radley house because he has never declined a dare. But as the story progresses; Jem has learned more about bravery from Atticus facing the mad dog, to Scout's confrontation towards the mod at the jail. He grew overall from a boy who drags his sister along to a young gentlemen that protects Scout and tries to help her understand all the events that are surrounding her.
This lines could be seen as examples of sensory imaginary. More precisely it is connected to smell because of the potato and sight because of how this person is found "sitting, surrounded.." it might be said that the combination of these two images could give the reader a vision of what the writer is trying to convey.
