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composition and slight oversight, similar to that which characterized the first step, to broaden the grounds of thought, and to surreptitiously include one after another of its essential conditions. This process is arrested at the outset, if we reclaim, as we should, the idea of resemblance. No generalization can go forward without it, and the fictitious growth of regulative ideas is checked at once. "We can not, for instance, compare sensations as co-existent or as successive, and under the one agreement smuggle in the idea of space, and under the other that of time. We are left, as we should be, standing on sensations alone; knowing color, odor, taste, but with no opportunity for comparison, classification, generalization, as we have no luminous idea under which a movement of thought is made visible.

There must be a little play given to thinking somewhere, in some direction, under some notion, before it can work out anything whatever; before it can acquire momentum, institute a process, and, in the superficial movement established, give apparent ground for the true connections of thought. The sensations are indeed present as the material of thought, the judgment is waiting as the agent of thought; but there is no plan of thought, no direction of thought, no space or orderly way wherein thought can find exercise, till some notion, most frequently this of resemblance, is furnished. The axe cannot cut while it is pressed close against the timber; tools are of no avail packed tightly in a chest. Give the hatchet the play of an inch, and with patience and an increasing sweep, it will at length hew for itself a broad path. Scope must be granted for wielding a weapon. One after another the implements must be loosened from their lodgment, and to initiate this movement, room, the ground and condition of effort, must be granted. So must room, an idea under which to move, be given to the very first judgment, before generalization is