Recent developments in cognitive science have prompted philosophers to speculate about the importance of empathy, the ability to directly apprehend and take on the mental and emotional states of others, in understanding and being motivated by moral norms—particularly moral norms concerning other humans. In this paper, I investigate whether some kind of empathy is involved in Thomas Aquinas’s account of the virtue of justice, which he describes as essentially other-directed. I claim that a kind of empathy is involved in Aquinas’s (...) notion of friendship and that this notion of friendship is related to justice as a virtue as its goal. Having the virtue of justice is geared towards establishing true friendship, at least in part. In so doing, it is directed towards establishing a sufficient groundwork for genuine empathy. Instances of genuine empathy, then, are approximations of this goal of the work of justice, even if they occur outside the context of a true friendship. Given this, I describe possible roles Aquinas might afford empathy and empathetic emotions in the context of cultivating the virtue of justice, including roles in motivation and knowledge. (shrink)