《宋史·列传·卷一百零三》
至于所知有限度，所能有彼此，这是功用之士，可以安排在外而不可以安排在内，可以让他负责具体事务而不可以让他负责言论。
至于所知有限量，所能有彼此，是功用之士也，可以处外而不可以处内，可以责之事而不可责之言。
As for what you know has limits, but what you can have can be mutual, this is a person of merit, who can be arranged to be external but not internal, who can be given a responsibility for certain affairs but not for speech.