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Sometime during the second half of the thirteenth century, Isaac of Corbeil composed a list of the commandments relevant for Jews living in medieval times and divided it into seven parts. The division into seven was meant to facilitate the recitation of a daily portion of commandments, so that the entire list would be recited each week by all male members of the Jewish community. Isaac is remembered today as being the author of the Semak, but his forgotten list of commandments and its liturgical function were equally important to him. In this study, Galinsky will demonstrate the centrality of the list of commandments for Isaac; explain its religious import, theological underpinning, and legal grounding; and reveal possible influences on its formation. In this exploration, intent, even without any corresponding action and follow-through, plays a significant role. However, to better appreciate what Isaac set out to accomplish, he will begin by describing the thirteenth-century context of his activity.