Compassion is the emotion that one feels in response to the suffering of others that motivates a desire to help. Compassion is often regarded as having an emotional aspect to it, though when based on cerebral notions such as fairness, justice and interdependence, it may be considered rational in nature and its application understood as an activity based on sound judgment. There is also an aspect of compassion which regards a quantitative dimension, such that individual's compassion is often given a property of "depth," "vigour," or "passion." The etymology of "compassion" is Latin, meaning "co-suffering." More involved than simple empathy, compassion commonly gives rise to an active desire to alleviate another's suffering.