This difference will to some extent explain what people call the unintelligibility of philosophy. Their difficulty lies partly in an incapacity--which in itself is nothing but want of habit--for abstract thinking; _i.e._ in an inability to get hold of pure thoughts and move about in them. In our ordinary state of mind, the thoughts are clothed upon and made one with the sensuous or spiritual material of the hour; and in reflection, meditation, and general reasoning, we introduce a blend of thoughts into feelings, percepts, and mental images. (Thus, in propositions where the subject-matter is due to the senses--_e.g._ 'This leaf is green'--we have such categories introduced, as being and individuality.) But it is a very different thing to make the thoughts pure and simple our object. But their complaint that philosophy is unintelligible is as much due to another reason; and that is an impatient wish to have before them as a mental picture that which is in the mind as a thought or notion. When people are asked to apprehend some notion, they often complain that they do not know what they have to think. But the fact is that in a notion there is nothing further to be thought than the notion itself. What the phrase reveals, is a hankering after an image with which we are already familiar. The mind, denied the use of its familiar ideas, feels the ground where it once stood firm and at home taken away from beneath it, and, when transported into the region of pure thought, cannot tell where in the world it is. One consequence of this weakness is that authors, preachers, and orators are found most intelligible, when they speak of things which their readers or hearers already know by rote,--things which the latter are conversant with, and which require no explanation. 4.] The philosopher then has to reckon with popular modes of thought, and with the objects of religion. In dealing with the ordinary modes of mind, he will first of all, as we saw, have to prove and almost to awaken the need for his peculiar method of knowledge. In dealing with the objects of religion, and with truth as a whole, he will have to show that philosophy is capable of apprehending them from its own resources; and should a difference from religious conceptions come to light, he will have to justify the points in which it diverges. 5.] To give the reader a preliminary explanation of the distinction thus made, and to let him see at the same moment that the real import of our consciousness is retained, and even for the first time put in its proper light, when translated into the form of thought and the notion of reason, it may be well to recall another of these old unreasoned beliefs. And that is the conviction that to get at the truth of any object or event, even of feelings, perceptions, opinions, and mental ideas, we must think it over. Now in any case to think things over is at least to transform feelings, ordinary ideas, &c. into thoughts.