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PART III. Of the other virtues and vices.
SECT. I. Of the origin of the natural virtues and vices.
WE come now to the examination of such virtues and vices as are entirely natural, and have no dependance on the ar∣tifice and contrivance of men. The exami∣nation of these will conclude this system of morals.
THE chief spring or actuating principle of the human mind is pleasure or pain; and when these sensations are remov'd, both from our thought and feeling, we are, in a great measure, incapable of passion or action, of desire or volition. The most immediate effects of pleasure and pain are the propense