But to admit the independence of intuition as regards concept does not suffice to give a true and precise idea of intuition. Another error arises among those who recognize this, or who at any rate do not explicitly make intuition dependent upon the intellect, to obscure and confuse the real nature of intuition. By intuition is frequently understood _perception,_ or the knowledge of actual reality, the apprehension of something as _real._ Certainly perception is intuition: the perceptions of the room in which I am writing, of the ink-bottle and paper that are before me, of the pen I am using, of the objects that I touch and make use of as instruments of my person, which, if it write, therefore exists;--these are all intuitions. But the image that is now passing through my brain of a me writing in another room, in another town, with different paper, pen and ink, is also an intuition. This means that the distinction between reality and non-reality is extraneous, secondary, to the true nature of intuition. If we imagine a human mind having intuitions for the first time, it would seem that it could have intuitions of actual reality only, that is to say, that it could have perceptions of nothing but the real. But since knowledge of reality is based upon the distinction between real images and unreal images, and since this distinction does not at the first moment exist, these intuitions would in truth not be intuitions either of the real or of the unreal, not perceptions, but pure intuitions. Where all is real, nothing is real. The child, with its difficulty of distinguishing true from false, history from fable, which are all one to childhood, can furnish us with a sort of very vague and only remotely approximate idea of this ingenuous state. Intuition is the undifferentiated unity of the perception of the real and of the simple image of the possible. In our intuitions we do not oppose ourselves as empirical beings to external reality, but we simply objectify our impressions, whatever they be. [Sidenote: _Intuition and the concepts of space and time._]