Book II: The Will.
Chapter II. Desire, Intellect, and Will..
§ 123.
As our principal concern is to ascertain what desire in ourselves is, not what desire in the animals is not, we need not dwell on the objections which naturally suggest themselves to the view that the actions of animals in all cases admit of being explained without the ascription to them of self-consciousness. They are objections which would probably disappear once the difference was realised between the existence of an individual soul and the individual's presentation of his individuality to himself--his distinction of himself from relations in which he stands to a world. Even when the difference has been apprehended, the affectionate observer of the dog and the horse may be slow to admit that their behaviour represents merely the sequence of impulses upon images of pain and pleasure, without conscious reference to self or to a world; which means without either such memory or such perception, such fear or such hope, as ours. We cannot deny, at any rate of beasts friendly to man, that in a certain sense they learn by experience; that the processes by which the trained or practised animal seeks to obtain the pleasure or avoid the pain, of which the imagination excites its impulse, imply the association with the imagined pleasure or pain of the images of many sensations which have been found to be connected with that pleasure or pain. It is readily assumed that such habitual sequence of images amounts to an experience of facts like our own; to an apprehension of an objective world, of which the necessary correlative is consciousness of self. The assumption becomes inveterate through the practice of describing the behaviour of animals in terms derived from our own experience,--a practice constantly becoming more prevalent, as the description of animal life becomes a more favourite subject of literary art. It is not to the purpose here to criticise the assumption in detail. It is enough to point out that it is an assumption; that the consciousness of objects as such, whether objects of knowledge or objects of desire, is more and other than any established sequence of images or any direction of desire by such sequent images; and that this consciousness of objects, whether any animals partake of it or no, is the characteristic thing in human experience, both in the experience through which we become acquainted with nature and in that through which morality arises. (§ 123 ¶ 1)