Now it is fairly clear that some such idealistic solution is already contained in germ in the pre-scientific view of the world of things. There can be little doubt that our original notion of the unity of the thing as contrasted with the multiplicity of its qualities has been obtained by “introjectively” ascribing to whatever groups of qualities act upon us as one in respect of some interest of our own, the same conscious unity of feeling which we know in ourselves and our fellows. We shall have frequent opportunities, as we proceed, of discovering the enormous extent to which the whole pre-scientific view of the world is based upon the interpretation of all existence in terms of our own. Systematic Idealism will thus gradually be found to be no more than the consistent and deliberate carrying through of that anthropomorphic interpretation of Reality which lies at the bottom of all man’s attempts to make his surroundings intelligible to himself. It will follow, if our general attitude towards the problem of substance is tenable, that only what we have already defined as an individual experience can truly be called a “substance,” and that such experiences are “substances,” if the word is to be retained in our philosophical vocabulary, to the same degree to which they are truly individual. And thus we should be led in the end to the distinction between the one infinite substance which forms the whole of Reality and the finite and imperfect substances which are its components. Again, we should have once more to remember that since, in general, we call that group of qualities one which acts on our interests as one, and our insight into those interests themselves is limited and confused, the boundaries assigned by us to the group of qualities we ascribe to a single substance as “its” states will be more or less arbitrary, and dependent upon the degree of our actual insight. It is possible for us to group together as states of the same thing qualities which a profounder insight would have disjoined, and _vice versâ_. And in the end, if all that is is contained in a single coherent self-determined system, it is clear that, speaking rigorously, there will ultimately be only one “substance”—the central nature or principle of the system itself—of which all subordinate aspects or parts of existence will be the attributes.