A chiasm is a literary structure where the words or themes of the first section of a passage are repeated in reverse order in the second. Typically whatever is in the center of the chiasm is what is being emphasized. In Genesis 27:1-45, the center compares the relationship of Jacob and Esau with their father Isaac. Between Jacob and Isaac, deception preceded blessing (Gen 27:18-29) , whereas between Esau and Isaac, torment preceded blessing (Gen 27:30-41).