In the last post on form I mentioned that matter cannot exist without form. Formless matter does not exist. What about the reverse situation? Can you have the form without the matter? The answer is yes.
This is what our intellect does. When we see dogs we are able to abstract what is essential to all dogs. We are able to abstract the form dogginess. We are able to grasp what is common to all the dogs that we have seen and formed an sense image of in our mind (known as a phantasm).
This fact is related to proving the spirituality (and hence immortality) of the soul.