If thought is the constitutive substance of external things, it is also the universal substance of what is spiritual. In all human perception thought is present; so too thought is the universal in all the acts of conception and recollection; in short, in every mental activity, in willing, wishing and the like. All these faculties are only further, specialisations of thought. When it is presented in this light, thought has a different part to play from what it has if we speak of a faculty of thought, one among a crowd of other faculties, such as perception, conception and will, with which it stands on the same level. When it is seen, to be the true universal of all that nature and mind contain, it extends its scope far beyond all these, and becomes the basis of everything. From this view of thought, in its objective meaning as [greek: nous], we may next pass to consider the subjective sense of the term. We say first, Man is a being that thinks; but we also say at the same time, Man is a being that perceives and wills. Man is a thinker, and is universal: but he is a thinker only because he feels his own universality. The animal too is by implication universal, but the universal is not consciously felt by it to be universal: it feels only the individual. The animal sees a singular object, for instance, its food, or a man. For the animal all this never goes beyond an individual thing. Similarly, sensation has to do with nothing but singulars, such as _this_ pain or _this_ sweet taste. Nature does not bring its "νοῦς" into consciousness: it is man who first makes himself double so as to be a universal for a universal. This first happens when man knows that he is 'I.' By the term 'I' I mean myself, a single and altogether determinate person. And yet I really utter nothing peculiar to myself, for every one else is an 'I' or 'Ego,' and when I call myself 'I,' though I indubitably mean the single person myself, I express a thorough universal. 'I,' therefore, is mere being-for-self, in which everything peculiar or marked is renounced and buried out of sight; it is as it were the ultimate and unanalysable point of consciousness We may say 'I' I and thought are the same, or, more definitely, 'I' is thought as a thinker. What I have in my consciousness, is for me. 'I' is the vacuum or receptacle for anything and everything: for which everything is and which stores up everything in itself. Every man is a whole world of conceptions, that lie buried in the night of the 'Ego.' It follows that the 'Ego' is the universal in which we leave aside all that is particular, and in which at the same time all the particulars have a latent existence. In other words, it is not a mere universality and nothing more, but the universality which includes in it everything. Commonly we use the word 'I' without attaching much importance to it, nor is it an object of study except to philosophical analysis. In the 'Ego,' we have thought before us in its utter purity.