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 enthusiasm, is so completely abstract as to be altogether out of the reach of the human faculties; and, in that sense, I have myself an enthusiasm for truth, but in no other: for the pleasure of metaphysical investigation lies in the means, not in the end; and, if the end could be found, the pleasure of the means would cease. The mind, to be kept in health, must be kept in exercise. The proper exercise of the mind is elaborate reasoning. Analytical reasoning is a base and mechanical process, which takes to pieces and examines, bit by bit, the rude material of knowledge; and extracts therefrom a few hard and obstinate things, called facts, every thing in the shape of which I cordially hate. But synthetical reasoning, setting up as its goal some unattainable abstraction, like an imaginary quantity in algebra, and commencing its course with