ما أحسن الدين والدنيا إذا اجتمعا ... وأقبح الكفر والإفلاس بالرجل
How fine are religion and worldly sufficiency when joined; how ugly unbelief and destitution in a person.
The first side coordinates goodness, religion, and worldly prosperity. The second coordinates ugliness, unbelief, and poverty. Each term is countered in the corresponding position.
“Worldly prosperity” and “destitution” are not formal logical contradictories in all contexts. Their rhetorical relation of provision versus deprivation supplies an intelligible contrast within the poem.