What more could be needed to suffuse the world with the deepest meaning and beauty? The attention is fixed upon a well-defined object, and all the effects it produces in the mind are easily regarded as powers or qualities of that object. But these effects are here powerful and profound. The soul is stirred to its depths. Its hidden treasures are brought to the surface of consciousness. The imagination and the heart awake for the first time. All these new values crystallize about the objects then offered to the mind. If the fancy is occupied by the image of a single person, whose qualities have had the power of precipitating this revolution, all the values gather about that one image. The object becomes perfect, and we are said to be in love.[2] If the stimulus does not appear as a definite image, the values evoked are dispersed over the world, and we are said to have become lovers of nature, and to have discovered the beauty and meaning of things. To a certain extent this kind of interest will centre in the proper object of sexual passion, and in the special characteristics of the opposite sex; and we find accordingly that woman is the most lovely object to man, and man, if female modesty would confess it, the most interesting to woman. But the effects of so fundamental and primitive a reaction are much more general. Sex is not the only object of sexual passion. When love lacks its specific object, when it does not yet understand itself, or has been sacrificed to some other interest, we see the stifled fire bursting out in various directions. One is religious devotion, another is zealous philanthropy, a third is the fondling of pet animals, but not the least fortunate is the love of nature, and of art; for nature also is often a second mistress that consoles us for the loss of a first. Passion then overflows and visibly floods those neighbouring regions which it had always secretly watered. For the same nervous organization which sex involves, with its necessarily wide branchings and associations in the brain, must be partially stimulated by other objects than its specific or ultimate one especially in man, who, unlike some of the lower animals, has not his instincts clearly distinct and intermittent, but always partially active, and never active in isolation. We may say, then, that for man all nature is a secondary object of sexual passion, and that to this fact the beauty of nature is largely due. _Social instincts and their aesthetic influence._