الْمُؤْمِنُ غِرٌّ كَرِيمٌ
Meaning: The believer is open-hearted and noble.
الْمُؤْمِنُ is the mubtadaʾ (the person being described). The following indefinite descriptive words غِرٌّ and كَرِيمٌ tell us what kind of character he has. The second half similarly begins وَالْفَاجِرُ and contrasts it with خَبٌّ لَئِيمٌ.
كَرِيمٌ concerns moral nobility, not simply being rich; لَئِيمٌ signals moral baseness, not poverty. Parallel sentence forms make the ethical opposition memorable.