Which textual evidence best develops this viewpoint? an argument is most effective when argued in a calm, rational manner. ". . if you are at any time obliged to enter an argument, give your reasons with the utmost candor and modesty, two qualities which will scarcely ever fail to make an impression upon your hearers." "the interests, education, and means by which men obtain their knowledge are so very different that it is impossible they should all think alike . ." "besides, if you are not dogmatic, and if you do not show by your words or actions that you are self-conceited, all present will more heartily rejoice at your victory. . " ". . nay, should you be worsted in argument, you may make your retreat with very good grace."