 [Men] judge what ends are most worthy to be pursued, how far every appetite and passion may be indulged, and when it ought to be resisted…. In them [the brutes] we may observe one passion combating another, and the strongest prevailing; but we perceive no calm principle in their constitution that is superior to every passion, and able to give law to it. (EAP, 5 and II.ii: 57)