The Natural Form for Aquinas Is Not a Natural Form

The human nature is constant even though the person may change dramatically over time. The natural form being human is what persists in and through the change as the principle of essential intelligibility. If we assemble a house from wood, stone, copper, and other natural substances, we create an artifact from those material things. Just like an artistic form like the house itself is composed of pre-existing parts, wood, and stone, and so forth, so the human person is a mere assembly of smaller parts, organs, cells, chemical compounds, atoms.