Aristotle observes in On the Soul that the “the activity of the sensible object and that of the sense is one and the same activity, and yet the distinction between their being remains (III.425b.25).” This observation has interesting social implications. If the sensible objects we encounter manifest themselves in the action of sensing them, then the phenomena of the other is co-constituted by the sensible in act and the sense in act. This is implies that that the other is in us as a result of our being an embodied consciousness able to be sensed and capable of sensing. The sensory experience of the other activates our sensory awareness which then acts upon the sensible object producing a presentation of the other. This presentation is an abstraction of the form of the other from the individual percept. The intellect is then capable of abstracting the form from the conditions of matter and applying universals for the purpose of making a judgment. What is interesting is that Aristotle claims that our senses never err when they perceive objects appropriate to the particular sense. For example, our eyes never err in seeing what is visible. The eyes do not see sound or the ears hear the visible. The senses do err however, in making judgments.
I am drawn back again and again to Aristotle’s statement “the soul is in a way all existing things (III.431b.22).” Aquinas clarifies what Aristotle means by this by distinguishing between Empedocles claim of simple identification between soul and object and Aristotle’s formal resemblance which understands the form of the object without matter (Commentary on Aristotle’s De Anima, 789-790.) What is so striking about this claim is Aristotle’s description of the mechanism that makes it possible to have an intellection of form without matter. Aristotle says that the imagination produces images “that are like sensuous contents except in that they contain no matter (III.431b.9).” In fact, cognition is impossible without these images. But, images are the products of movement initiated by sensation or reproductions from memory during reflection. In each case images are the immaterial form of the object without matter and yet retain the conditions of matter.
This imaginative capacity is a mechanism for mirroring objects of sensation which has striking similarities with the recent discovery of mirror neurons and their implied shared manifold of inter-subjectivity (cf. Gallese, Vittorio, “The Roots of Empathy: The Shared Manifold Hypothesis and the Neural Basis of Intersubjectivity). Studies have shown infants as young as18 hours old are able to mimic mouth and facial movements of the adults facing them. This is how infants learn about themselves and consequently about others. This capacity is the result of an inter-subjectivity that is rooted neurologically in what are called mirror neurons which are basic organizational features of the brain which allow for action stimulation. What is even more striking is that these neurons require sensory stimulation by an agent and its object: self or other. When monkeys were monitored these neurons were activated during actions executed by the agent and in actions observed. The monkey was able to create an internal copy of what was observed but in reference to its own body.
This seems very similar to Aristotle’s theory of imagination and his claim that the mind is in a way all things. The mind is capable of cognizing all things through sensation and the imagination. One major problem with this connection may be the extent to which a monkey brain and a human brain can imagine. Aristotle does say animals have imagination but he does not grant that their minds are all things because they are not oriented towards universals, which is the orientation of the human intellect, but merely to individuals which is the orientation of sensation.
Both Edith Stein and Merleau-Ponty have addressed inter-subjectivity and their work is referenced in the secondary literature on mirror neurons. I still need to explicate the details on this connection but Aristotle seems to have the basic insight that neuroscience and neuropsychology are now confirming.