困知勉行

Explanation: Constantly seek to overcome the difficulties of knowledge, managed to have the knowledge to practice. 　　Usage: Joint type; as predicate, object; to overcome the difficulties of knowledge obtained 　　Source: Han Dai Holy "Book of Doctrine of the Mean": "or born with knowledge, or or learned, or difficulties with knowledge, and one has to know. Or safety of the line or the line of interest, or the line of force , and its successful one too. "