After presenting the purposes of the first two disciplines, the text identifies the third:
وَإِلَّا فَهُوَ الْفَنُّ الثَّالِثُ
Otherwise, it belongs to the third discipline.
ʿIlm al-Badiʿ studies appropriate verbal and semantic embellishments, such as meaningful contrast and patterning. Yet a high number of rhetorical devices does not itself make an expression effective.
If the intended meaning has not been properly conveyed, additional ornament cannot repair the fundamental problem. Embellishment works best on an already appropriate expression.