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 does not itself descend into the arena of immediate sensuous presentation. Knowledge is not eating, and we cannot expect to devour and possess what we mean. Knowledge is recognition of something absent; it is a salutation, not an embrace. It is an advance on sensation precisely because it is representative. The terms or goals of thought have for their function to subtend long tracts of sensuous experience, to be ideal links between fact and fact, invisible wires behind the scenes, threads along which inference may run in making phenomena intelligible and controllable. An idea that should become an image would cease to be ideal; a principle that is to remain a principle can never become a fact. A God that you could see with the eyes of the body, a heaven you might climb into by a ladder planted at Bethel, would be parts of this created and interpretable world, not terms in its interpretation nor objects in a spiritual sphere. Now external objects are thought to be principles and sources of experience; they are accordingly conceived realities on an ideal plane. We may look for all the evidence we choose before we declare our inference to be warranted; but we must not ask for something more than evidence, nor expect to know realities without inferring them anew. They are revealed only to understanding. We cannot cease to think and still continue to know.

It may be said, however, that principles and external objects are interesting only because they