《世说新语·言语》
张天锡说： 说到研讨深奥的玄学，自王弼、何晏以来是最好的了；说到根据时势修订规章制度，那就有荀、荀勖和乐广的作风。 
张曰： 研求幽邃，自王、何以还；因时脩制，荀、乐之风。 
Zhang Tianxi said: “Speaking of studying profound metaphysics, it’s better than Wang Bi and He Yan since the beginning of time; speaking of revising rules and regulations based on the trend of the time, it has the style of Xun, Xun Xu, and Le Guang.”