Knowing by Heart describes the movement of loving as a participation that bears on all beings. Eschewing the dichotomy of rationalism and sensibility that has dominated discussions of love and emotion, Steinbock understands the heart as a vast schema ranging from the deepest loving to affects and felt conditions. The book brings into focus the importance of a full-bodied relational account of a normative critique based in emotion. From a phenomenological description of diverse feelings to the normativity of loving as the discernment of the heart, this work evaluates hating's relation to loving. At the basis of all this is a phenomenological and philosophical anthropology in response to the basic question: In reality, who and what are we?