"In general, there are three kinds of messengers. The first kind is extremely clever. The second is not particularly clever but is not foolish, either. The third is extremely foolish but nevertheless reliable.
Of these three types, the first will commit no error [in transmitting the message]. The second, being somewhat clever but not quite as clever as the first type, will add his own words to his lord’s message. Thus he is the worst possible type of messenger. The third type, being extremely foolish, will not presume to insert his own words and, being honest, will relay his lord’s message without deviating from it. Thus he is a better messenger than the second type, and occasionally may be even better than the first."