Climactic Hebrew poetry builds progressively on ideas in what is called "staircase parallelism." In Moroni 10:20-22, Moroni not only ascends the staircase of ideas, but descends with dramatic power. According to Gary Hatch, consider the following passage on faith, hope, and charity:
Wherefore, there must be faith
and if there must be faith there must also be hope
and if there must be hope there must also be charity
And except ye have charity ye can in nowise be saved
in the kingdom of God
neither can ye be saved in the kingdom of God if ye have not faith
neither can ye if ye have no hope
And if ye have no hope ye must needs be in despair
and despair cometh because of iniquity. (Moroni 10:20-22)
Note how Moroni begins coordinate sentences in the same manner to emphasize the relationships among these sentences. . . . These words from a mirror reflection around the word God, the foundations of the gospel--faith, hope, and charity--opposed by Satan's inversion of this trinity--lack of faith, despair, and iniquity. [Gary L. Hatch, "Mormon and Moroni: Father and Son," in The Book of Mormon: Fourth Nephi through Moroni, From Zion to Destruction, pp. 112-113]