The necessity of backing personal attachment with ideal interests is what makes true friendship so rare. It is found chiefly in youth, for youth best unites the two requisite conditions—affectionate comradeship and ardour in pursuing such liberal aims as may be pursued in common. Life in camp or college is favourable to friendship, for there generous activities are carried on in unison and yet leave leisure for playful expansion and opportunity for a choice in friends. The ancients, so long as they were free, spent their whole life in forum and palæstra, camp, theatre, and temple, and in consequence could live by friendship even in their maturer years; but modern life is unfavourable to its continuance. What with business cares, with political bonds remote and invisible, with the prior claims of family, and with individualities both of mind and habit growing daily more erratic, early friends find themselves very soon parted by unbridgeable chasms. For friendship to flourish personal life would have to become more public and social life more simple and humane. [Sidenote: Friendship between man and wife.] The tie that in contemporary society most nearly resembles the ancient ideal of friendship is a well-assorted marriage. In spite of intellectual disparity and of divergence in occupation, man and wife are bound together by a common dwelling, common friends, common affection for children, and, what is of great importance, common financial interests. These bonds often suffice for substantial and lasting unanimity, even when no ideal passion preceded; so that what is called a marriage of reason, if it is truly reasonable, may give a fair promise of happiness, since a normal married life can produce the sympathies it requires. [Sidenote: Between master and disciple.]