"The proposition, that our cognitions of objects are only in part dependent on the objects themselves, and in part on elements superadded by our organs or our minds, is not identical, nor _prima facie_ absurd. It cannot, however, warrant the assertion that all our knowledge, but only that the part so added, is relative. If our author had gone as far as Kant, and had said that all which constitutes knowledge is put in by the mind itself, he would have really held, in one of its forms, the doctrine of the relativity of our knowledge. But what he does say, far from implying that the whole of our knowledge is relative, distinctly imports that all of it which, is real and authentic is the reverse. If any part of what we fancy that we perceive in the objects themselves, originates in the perceiving organs or in the cognising mind, thus much is purely relative; but since, by supposition, it does not all so originate, the part that does not is as much absolute as if it were not liable to be mixed up with, these delusive subjective impressions."--(P. 30.) Mr. Mill, therefore, supposes that _wholly relative_ must mean _wholly mental_; in other words, that to say that a thing is wholly due to a relation between mind and matter is equivalent to saying that it is wholly due to mind alone. On the contrary, we maintain that Sir W. Hamilton's language is far more accurate than Mr. Mill's, and that the above theory can with perfect correctness be described as one of _total relativity_; and this from two points of view. First, as opposed to the theory of partial relativity generally held by the pre-Kantian philosophers, according to which our sensitive cognitions are relative, our intellectual ones absolute. Secondly, as asserting that the object of perception, though composed of elements partly material, partly mental, yet exhibits both alike in a form modified by their relation to each other. The composition is not a mere mechanical juxtaposition, in which each part, though acting on the other, retains its own characteristics unchanged. It may be rather likened to a chemical fusion, in which both elements are present, but each of them is affected by the composition. The material part, therefore, is not "as much absolute as if it were not liable to be mixed up with subjective impressions." But we must hear the continuation of Mr. Mill's criticism:--