وَكَمْ عَاقِلٍ عَاقِلٍ أَعْيَتْ مَذَاهِبُهُ
How many profoundly intelligent people have found their strategies exhausted!
وَجَاهِلٍ جَاهِلٍ تَلْقَاهُ مَرْزُوقًا
And how many thoroughly ignorant people do you find well provided for!
An ensuing «هذا» may bring the surprising contrast itself into view, an effect stronger than simply resuming with a weak pronoun. The doubled words «عاقل عاقل» and «جاهل جاهل» intensify the respective descriptions and sharpen the paradox motivating the demonstrative.