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These cases occur because the Friendship of the lover for the

beloved object is based upon pleasure, that of the other for him

upon utility, and in one of the parties the requisite quality is

not found: for, as these are respectively the grounds of the

Friendship, the Friendship comes to be broken up because the

motives to it cease to exist: the parties loved not one another

but qualities in one another which are not permanent, and so

neither are the Friendships: whereas the Friendship based upon

the moral character of the parties, being independent and

disinterested, is permanent, as we have already stated.