There is a well-known literary device in Hebrew called a merism. A merism expresses two extremes in order to signify the whole range between them. When Christ calls Himself Alpha and Omega, the beginning and the end, He is not limiting Himself to those endpoints but claiming everything they encompass.
In my study of Isaiah, I began to notice that this meristic logic often operates beyond the phrase or verse level. Frequently, a text presents two bounded domains, and then follows them with a third unit that does not introduce a new idea, but enacts what the first two already defined.
The third unit is not a summary. It is not a synthesis. It is the first lived traversal of the space the merism establishes.
When a meristic pair is followed by such a realizing unit, I refer to the pattern as an Extended Merism. When this occurs across chapters or major literary blocks, I refer to it as an Extended Architectural Merism.
This framework clarifies a question that has generated an extraordinary amount of unnecessary speculation: why do we have two creation accounts?
Rather than multiplying theories, we can observe the structure.
This pattern is present in Genesis, but it is far clearer in the Book of Moses. The Book of Abraham employs a different meristic axis, but preserves the same underlying logic.
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