Chiasm is a very old way of building/telling a story.
Employed by the Holy Spirit throughout the Scripture.
The 10 commandments are a chiasm.
It’s biblical!
Think of it as a hamburger.
The best part (most important) is in the middle.
An old friend of mine - mentor/”older brother” - who was a good writer advised me once, when writing:
1. Tell what you’re going to tell them.
2. Tell them.
3. Tell them what you told them.
Sounds similar!