2216. But the ideas or thoughts of angels, that is, those of the inward heaven, in comparison to those of a person on earth, do not extend farther than the interiors of the little animal mentioned [2211], namely, to its integral parts, such as the numerous internal organs taken as whole parts, like the many little glands, or more general compositions. So what are within these whole parts or internal organs, such as in the brain, in its spinal marrows, in the stomach, the heart and the liver, they do not know. Yet here again a new and broad field presents itself, of mysteries out of which those members are composed. Taking only the liver as an example, there are countless things which compose it, such as glandular aggregations consisting of smaller glands, as well as little tubes, ducts, indeed there are many other things in them, to which the ideas of the very inward and innermost angels' thoughts are comparable.