Even ideas give to our conceptual life an individual stamp. Each one of us has his special standpoint from which he looks out on the world. His concepts link themselves to his percepts. He has his own special way of forming general concepts. This special character results for each of us from his special standpoint in the world, from the way in which the range of his percepts is dependent on the place in the whole where he exists. The conditions of individuality here indicated, we call the milieu. This special character of our experience must be distinguished from another which depends on our peculiar organisation. Each of us, as we know, is organised as a unique, fully determined individual. Each of us combines special feelings, and these in the most varying degrees of intensity, with his percepts. This is just the individual element in the personality of each of us. It is what remains over when we have allowed fully for all the determining factors in our milieu. A life of feeling, wholly devoid of thought, would gradually lose all connection with the world. But man is meant to be a whole, and knowledge of objects will go hand-in-hand for him with the development and education of the feeling-side of his nature. Feeling is the means whereby, in the first instance, concepts gain concrete life. VII ARE THERE ANY LIMITS TO KNOWLEDGE? We have established that the elements for the explanation of reality are to be taken from the two spheres of perception and thought. It is due, as we have seen, to our organisation that the full totality of reality, including our own selves as subjects, appears at first as a duality. Knowledge transcends this duality by fusing the two elements of reality, the percept and the concept, into the complete thing. Let us call the manner in which the world presents itself to us, before by means of knowledge it has taken on its true nature, "the world of appearance," in distinction from the unified whole composed of percept and concept. We can then say, The world is given to us as a duality (Dualism), and knowledge transforms it into a unity (Monism). A philosophy which starts from this basal principle may be called a Monistic philosophy, or Monism. Opposed to this is the theory of two worlds, or Dualism. The latter does not, by any means, assume merely that there are two sides of a single reality, which are kept apart by our organisation, but that there are two worlds totally distinct from one another. It then tries to find in one of these two worlds the principle of explanation for the other. Dualism rests on a false conception of what we call knowledge. It divides the whole of reality into two spheres, each of which has its own laws, and it leaves these two worlds standing outside one another.