The appetites, being mere bodily impulses, and being all liable to excess or misdirection, need the control of the will, and of the principles of action by which the will is determined and regulated. Section II. The Desires. The Desires are distinguished from the Appetites, first, in their not originating from the body; secondly, in their not being necessarily intermittent; and thirdly, in their tendency to increase indefinitely, often through the whole of life, and to gain strength by the attainment of their specific objects. If classified by their objects, they might seem too numerous to be specified; but they may all be embraced under the titles of the Desire for Knowledge, for Society, for Esteem, for Power, and for Superiority. These all may be traced, in a more or less rudimentary form, in the inferior animals. Many of these animals show an active curiosity. Many are gregarious in their native state, and most of the domestic animals delight in the society of their kind; some take manifest pleasure in human society; and the instances are by no means rare, in which animals, by nature mutually hostile, become strongly attached to each other, and render to each other the most friendly services. The dog, the horse, and the cat evidently crave the esteem of human beings, and show tokens of genuine grief when they incur rebuke or discern tokens of disapproval. The dog maintains with watchful jealousy his own authority in his own peculiar domain; and in the chase or on the race-ground the dog and the horse are as emulous of success as their masters.