Readers are interested only in emotions with which they are familiar by experience. Howells's refined love-scenes have often been sneered at by men who like raw whiskey but cannot appreciate the delicate bouquet of Chambertin. As Professor Ribot remarks: in the higher regions of science, art, religion, and morals there are emotions so subtle and elevated that "not more than one individual in a hundred thousand or even in a million can experience them. The others are strangers to them, or do not know of their existence except vaguely, from what they hear about them. It is a promised land, which only the select can enter." I believe that romantic love is a sentiment which more than one person in a million can experience, and more than one in a hundred thousand. How many more, I shall not venture to guess. All the others know love only as a sensual craving. To them "I love you" means "I long for you, covet you, am eager to enjoy you"; and this feeling is not love of another but self-love, more or less disguised--the kind of "love" which makes a young man shoot a girl who refuses him. The mediaeval writer Leon Hebraeus evidently knew of no other when he defined love as "a desire to enjoy that which is good"; nor Spinoza when he defined it as _laetetia concomitante idea externae causae_--a pleasure accompanied by the thought of its external cause. MISTAKES REGARDING CONJUGAL LOVE Having distinguished romantic or sentimental love from sentimentality on one side and sensuality on the other, it remains to show how it differs from conjugal affection. HOW ROMANTIC LOVE IS METAMORPHOSED On hearing the words "love letters," does anybody ever think of a man's letters to his wife? No more than of his letters to his mother. He may love both his wife and his mother dearly, but when he writes love letters he writes them to his sweetheart. Thus, public opinion and every-day literary usage clearly recognize the difference between romantic love and conjugal affection. Yet when I maintained in my first book that romantic love differs as widely from conjugal affection as maternal love differs from friendship; that romantic love is almost as modern as the telegraph, the railway, and the electric light; and that perhaps the main reasons why no one had anticipated me in an attempt to write a book to prove this, were that no distinction had heretofore been made between conjugal and romantic love, and that the apparent occurrence of noble examples of conjugal attachment among the ancient Greeks had obscured the issue--there was a chorus of dissenting voices. "The distinction drawn by him between romantic and conjugal love," wrote one critic, "seems more fanciful than real." "He will not succeed," wrote another, "in convincing anybody that romantic and conjugal love differ in kind instead of only in degree or place"; while a third even objected to my theory as "essentially immoral!"