457c-e (tr. W.R.M. Lamb):
It is not easy for people to define to each other the matters which they take in hand to discuss, and to make such exchange of instruction as will fairly bring their debate to an end: no, if they find that some point is in dispute between them, and one of them says that the other is speaking incorrectly or obscurely, they are annoyed and think the remark comes from jealousy of themselves, and in a spirit of contention rather than of inquiry into the matter proposed for discussion. In some cases, indeed, they end by making a most disgraceful scene, with such abusive expressions on each side that the rest of the company are vexed on their own account that they allowed themselves to listen to such fellows.