Interiority and Law presents a groundbreaking reassessment of a medieval Jewish classic, Baḥya ibn Paquda's Guide to the Duties of the Hearts. Michaelis reads this work anew as a revolutionary intervention in Jewish law, or halakha. Overturning perceptions of Baḥya as the shaper of an ethical-religious form of life that exceeds halakha, Michaelis offers a pioneering historical and conceptual analysis of the category of "inner commandments" developed by Baḥya. Interiority and Law reveals that Baḥya's main effort revolved around establishing a new legal formation—namely, the "duties...