Friendship of this kind is thought to exist principally among the old (because men at that time of life pursue not what is pleasurable but what is profitable); and in such, of men in their prime and of the young, as are given to the pursuit of profit. They that are such have no intimate intercourse with one another; for sometimes they are not even pleasurable to one another; nor, in fact, do they desire such intercourse unless their friends are profitable to them, because they are pleasurable only in so far as they have hopes of advantage. With these Friendships is commonly ranked that of hospitality. But the Friendship of the young is thought to be based on the motive of pleasure: because they live at the beck and call of passion and generally pursue what is pleasurable to themselves and the object of the present moment: and as their age changes so likewise do their pleasures. This is the reason why they form and dissolve Friendships rapidly: since the Friendship changes with the pleasurable object and such pleasure changes quickly. The young are also much given up to Love; this passion being, in great measure, a matter of impulse and based on pleasure: for which cause they conceive Friendships and quickly drop them, changing often in the same day: but these wish for society and intimate intercourse with their friends, since they thus attain the object of their Friendship. Chapter V. That then is perfect Friendship which subsists between those who are good and whose similarity consists in their goodness: for these men wish one another’s good in similar ways; in so far as they are good (and good they are in themselves); and those are specially friends who wish good to their friends for their sakes, because they feel thus towards them on their own account and not as a mere matter of result; so the Friendship between these men continues to subsist so long as they are good; and goodness, we know, has in it a principle of permanence. Moreover, each party is good abstractedly and also relatively to his friend, for all good men are not only abstractedly good but also useful to one another. Such friends are also mutually pleasurable because all good men are so abstractedly, and also relatively to one another, inasmuch as to each individual those actions are pleasurable which correspond to his nature, and all such as are like them. Now when men are good these will be always the same, or at least similar.