In the first chapter of the Comprehensive Mirror for Aid in Government, Sima Guang explains the fall of the Zhi clan. Zhi Xuanzi chose Zhi Yao as his heir, and the clan was destroyed. “Zhi Bo perished because his talent exceeded his virtue.”
Sima Guang then sorts people into four kinds. “One complete in talent and virtue is a sage. One lacking both is a fool. One whose virtue exceeds his talent is a gentleman. One whose talent exceeds his virtue is a petty man.” If no sage or gentleman can be found, “it is better to get a fool than a petty man.”