How does Shannon Hale use imagery in Enna Burning?

Examples of Imagery:

"He says, it's no ugly thing to be a fire worshipper. The sun is the manifestation of the Creator, and fire is the manifestation of the sun. But it is not an easy blessing. That's why they're all here"

"But when a person knows both heat and water, they form a balance. The language of the fire doesn't overwhelm them, tempered by the presence of the water, and the water can't consume the person because of the threat of the heat always near."