14. To treat one's neighbor as oneself is to be concerned simply with his existence. This pertains to the natural law. To love one's neighbor as oneself is to care, in a way that accords with virtue, for his well-being. This is prescribed by the written law (cf Lev. 19:18; Mark 12:33). To love one's neighbor more than oneself is a prerogative of the law of grace.
