XXXVI. (132) Again, it is not every speech which should come forward to meet the conceptions; nor is it every kind of conception that it should come to meet; but only the perfect Aaron who should come forward to meet the conceptions of the most perfect Moses. Since else why, when God had said, "Behold, is not Aaron thy brother?" did he add, "the Levite," if it were not for the sake of teaching that it belongs to the Levite and priest, and to virtuous speech alone, to give information respecting the conceptions of the mind, which are shoots of the perfect soul. (133) For never may the speech of a wicked man be interpreter of divine doctrines, for such an one would deform their beauty by his own pollutions; and, on the other hand, may what is intemperate and disgraceful never be related by the utterance of a virtuous man, but may sacred and holy conversations always deliver the relation of holy things. (134) In some of the best governed cities of the world they say that such a custom as this prevails. When any man who has not lived well attempts to deliver his opinion, either in the council or in the assembly of the people, he is not permitted to do so by his own mouth, but is compelled by the magistrates to deliver his opinion to some virtuous and honourable man to explain in his behalf; and then he, when he has heard what he wishes said, rises up and unfolds the meaning of the sewn up mouth of his instructor, becoming his extempore pupil; and he displays the imaginations of another, scarcely considering the original concern for them even in the rank of a hearer or spectator. So some people do not choose to receive even benefits from unworthy persons, but look upon the injury accruing from the shame of taking their advice as greater than the advantage which can be derived from it.