“An increase of pride diminishes gratitude. So doth sensuality, or the increase of sensual appetites; which coming more and more under the power and impression of sensible objects, tends by degrees to make the mind insensible to any thing else. Those appetites take up the whole soul; and, through habit and custom, the water is all drawn out of other channels in which it naturally flows, and is carried as it were into one channel … Genuine virtue prevents that increase of the habits of pride and sensuality, which tend to diminish the exercises of the useful and necessary principles of nature. And a principle of general benevolence softens and sweetens the mind, makes it more susceptible of the proper influence of the gentler natural instincts, directs every one into its proper channel, determines the exercise to the proper manner and measure, and guides all to the best purposes.”
—Jonathan Edwards, The Nature of True Virtue (University of Michigan Press, 1960), pp. 93, 97.