Page:Ferrier's Works Volume 1 - Institutes of Metaphysic (1875 ed.).djvu/609

forcible manner, I must be pardoned if I deem the following answer sufficient. All that is necessary, in the eye of reason, to constitute knowledge is, that, in every cognition, there shall be a point of unity and a point (or points) of diversity. (See Institutes, Prop. VI. Epistem.) But this law is fulfilled so soon as the ego turns round once upon itself (performs one act of self-duplication). It then apprehends itself, together with the other element of cognition, whatever that may be, which is not itself. And no more than this single self-duplication, or reflection on self, seems to be necessary, either for the constitution of the object, or for the performance of the act of knowledge. When Mr Mansel, in the extract quoted, speaks of "two selves," I cannot suppose him to mean that, according to my doctrine, there are two separate selves involved in the process of cognition, although his words might seem to imply that such is his understanding of my position. The ego, which is known by itself, is one and the same with that which knows itself.