  The notion that all creatures are composites of matter and form requires that something be said about what we might otherwise call “immaterial” substances—angels, Aristotelian “separated substances,” the human soul after death. For universal hylomorphism, such entities cannot be truly immaterial, and yet they are obviously quite unlike familiar physical objects. As a result, universal hylomorphists distinguished between “corporeal” matter, i.e., the matter of physical, sensible objects, and another kind of matter sometimes called  “spiritual matter.”[5]