it is generally believed that the Gospel of John has the most complete chiasmus in the New Testament. There are many different chiasms that have been identified in John's Gospel, but one of the most famous is the chiasm of John 1:1-18. This chiasm is often referred to as the "Johannine Prologue" and it is thought to be the key to understanding the entire Gospel of John.
These chiasms have been used by scholars to argue that John's Gospel is a carefully crafted literary work that is designed to communicate its message in a powerful and memorable way.
Peter Ellis is a scholar who has argued that the Gospel of John is structured chiastically. He proposes a chiasm for the entire book of John, which can be summarized as follows: