The effect of a duelling spirit, on the heart that nourishes it, is of a most deplorable character. This self-vindicating spirit, gradually destroys a man’s confidence in the integrity, intelligence, and enlightened impartiality of those around him. […] he will heed as little the lofty generous enterprises that kindle upon the moral world, as a caverned bear the luminous expanse of the glittering heaven. The spirit which he fosters has this tendency, and if the fosterage is persevered in, will have this effect.