  Matter and form—referred to in his Hebrew poetry under the alluring Hebrew labels of “yesôd” (foundation) and “sôd” (secret)—are, along with the doctrine of Divine Will, cornerstones of the Fons Vitae. In particular, the Fons Vitae teaches (rather unusually within the history of ideas) that all things—including  spiritual simples such as soul and intellect (but not God)—are  comprised of matter and form. This doctrine is called “Universal Hylomorphism” by later scholastics in contrast to ordinary Aristotelian hylomorphism in which all substances other than soul/intellect are said to be comprised of matter (Greek: hûlê) and form (Greek: morphê). This doctrine of Universal Hylomorphism emerges as a central theological and philosophical point of contention between Augustinian Franciscans (who embrace it) and Aristotelian Dominicans (who reject it). (It might be noted that one popular way that the Fons Vitae doctrine comes up in medieval Christian debates is on the question of whether angels (the separate intellects) are made up of matter and form, or just  form).[27]