There is this peculiarity about love in a well-regulated social state. It is the only passion that is quite strictly limited in its indulgence. Of the intellectual passions a man may indulge several different ones either successively or together; in the ordinary physical enjoyments, such as the love of active sports or the pleasures of the table, he may carry his indulgence very far and vary it without blame; but the master passion of all has to be continually quelled, the satisfactions that it asks for have to be continually refused to it, unless some opportunity occurs when they may be granted without disturbing any one of many different threads in the web of social existence; and these threads, to a lover's eye, seem entirely unconnected with his hope. In stating the fact of these restraints I do not dispute their necessity. On the contrary, it is evident that infinite practical evil would result from liberty. Those who have broken through the social restraints and allowed the passion of love to set up its stormy and variable tyranny in their hearts have led unsettled and unhappy lives. Even of love itself they have not enjoyed the best except in those rare cases in which the lovers have taken bonds upon themselves not less durable than those of marriage; and even these unions, which give no more liberty than marriage itself gives, are accompanied by the unsettled feeling that belongs to all irregular situations. It is easy to distinguish in the conventional manner between the lower and the higher kinds of love, but it is not so easy to establish the real distinction. The conventional difference is simply between the passion in marriage and out of it; the real distinction would be between different feelings; but as these feelings are not ascertainable by one person in the mind or nerves of another, and as in most cases they are probably much blended, the distinction can seldom be accurately made in the cases of real persons, though it is marked trenchantly enough in works of pure imagination. The passion exists in an infinite variety, and it is so strongly influenced by elements of character which have apparently nothing to do with it, that its effects on conduct are to a great extent controlled by them. For example, suppose the case of a man with strong passions combined with a selfish nature, and that of another with passions equally strong, but a rooted aversion to all personal satisfactions that might end in misery for others. The first would ruin a girl with little hesitation; the second would rather suffer the entire privation of her society by quitting the neighborhood where she lived.