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be no mere contribution to philosophical literature. It must be no mere bringing together of materials for some other hand to arrange. How fond most of the contributors to science are of taking this view of their own labours! Modest people! As if any one would thank a mason who should say to him—"There, sir, are the stones; you can now build your house for yourself!" It must embrace every essential part of philosophy, thoroughly digested, and strictly reasoned out as a harmonious and consistent whole. It must show the exact point where every opinion and every controversy in philosophy takes off from the tap-root or main trunk of the great tree of speculation. The disputants themselves never