How does some of the power of Edward's sermon derive from his use of parallel constructions?

In his fire
and brimstone speech,makes effective use of parallel constructions in order to create images and
elicit emotions that will generate an understanding in his congregation of the precariousness of
their situation on earth.

The repetition of a grammatical structure,is an
effective rhetorical device used to link together related ideas, and thereby provide clarity
and...