To readily believe information from only one source or perspective, without seeking or considering other viewpoints; to be credulous and prejudiced.
Era:
Ancient
Frequency:
Story:
During the Tang Dynasty, Emperor Taizong appointed Wei Zheng as his prime minister. One day, the emperor asked Wei Zheng how he could become a wise and benevolent ruler.
Wei Zheng responded by explaining that ancient sage-kings like Yao and Shun were renowned for their wisdom and for successfully governing their realms because they were adept at listening to various perspectives and advice from all sides. In contrast, he pointed out that rulers such as Qin Er Shi, Emperor Wu of Liang, and Emperor Yang of Sui met their downfall because they were prone to heed only one side and blindly believe it, failing to grasp the true circumstances.
Emperor Taizong found Wei Zheng's words to be very insightful and reasonable.