91
As, therefore, it is characteristic of true friendship both to give and to receive advice and, on the one hand, to give it with all freedom of speech, but without harshness, and on the other hand, to receive it patiently, but without resentment, so nothing is to be considered a greater bane of friendship than fawning, cajolery, or flattery; for give it as many names as you choose, it deserves to be branded as a vice peculiar to fickle and false-hearted men who say everything with a view to pleasure and nothing with a view to truth.
92
Moreover, hypocrisy is not only wicked under all circumstances, because it pollutes truth and takes away the power to discern it, but it is also especially inimical to friendship, since it utterly destroys sincerity, without which the word friendship can have no meaning. And since the effect of friendship is to make, as it were, one soul out of many, how will that be possible if not even in one man taken by himself shall there be a soul always one and the same, but fickle, changeable, and manifold?