A mirror structure, often called a concentric structure or a , arranges several elements in an order that is reversed around a center.
In its simplest form, it can be represented as follows:
A - B - C - C' - B' - A'
The first element corresponds to the last, the second to the second to last, and so on.
In such an arrangement, the central position may receive particular importance, but one must avoid making this an absolute rule. The meaning of a passage must first be established by its content.
In Daniel, section 2-7 lends itself particularly well to this analysis because the thematic correspondences are accompanied by a linguistic boundary: these chapters belong to the great Aramaic section of the book.