Page:Biographia literaria; or, Biographical sketches of my literary life and opinions (IA biographialitera04cole).pdf/103

 ing the mode in which our perceptions originated, could not alter the natural difference of things and thoughts. In the former, the cause appeared wholly external, while in the latter, sometimes our will interfered as the producing or determining cause, and sometimes our nature seemed to act by a mechanism of its own, without any conscious effort of the will, or even against it. Our inward experiences were thus arranged in three separate classes, the passive sense, or what the school-men call the merely receptive quality of the mind; the voluntary, and the spontaneous, which holds the middle place between both. But it is not in human nature to meditate on any mode of action, without enquiring after the law that governs it; and in the explanation of the spontaneous movements of our being, the metaphysician took the lead of the anatomist and natural philosopher. In Egypt, Palestine, Greece, and India the analysis of the mind had reached its noon and manhood, while experimental research was still in its dawn and infancy. For many, very many centuries, it has been difficult to advance a new truth, or even a new error, in the philosophy of the intellect or morals. With regard, however, to the laws that direct the spontaneous movements of thought and the principle of their intellectual mechanism there exists, it has been asserted, an important ex-