SPIRITUAL VS NATURE

Another often-discussed aspect of human nature is the existence and relationship of the physical body with a spirit or soul that transcends the human's physical attributes, as well as the existence of any transcendent purpose. In this area, there are three dominant views:

* The philosophical naturalist position is that humans are entirely natural, with no spiritual component or transcendent purpose. Subsets of the naturalist view include the materialist and physicalist positions, which hold that humans are entirely physical. However, some naturalists are also dualists about mind and body. Naturalism, combined with the natural and social sciences, views humans as the unplanned product of evolution, which operated in part by natural selection on random mutations. Philosophical naturalists do not believe in a supernatural afterlife. While philosophical naturalism is often assailed as an unacceptable view of human nature, it is promoted by many prominent philosophers and thinkers. The philosophical naturalist often will view religious belief as similar to superstition and as the product of unsound or magical thinking.

* In contrast to materialism, there is the Platonic or idealist position. It can be expressed in many ways, but in essence it is the view that there is a distinction between appearance and reality, and that the world we see around us is simply a reflection of some higher, divine existence, of which the human (and perhaps also the animal) soul/mind or spirit may be part. In his Republic, Book VII, Plato represents humankind as prisoners chained from birth inside an underground cave, unable to move their heads, and therefore able to see only the shadows on the walls created by a fire outside the cave, shadows that, in their ignorance, the cave dwellers mistake for reality. For Plato, therefore, the soul is a spirit that uses the body. It is in a non-natural state of union, and longs to be freed from its bodily prison (cf. Republic, X, 611).

* Between materialism and idealism lies the thought of St. Thomas Aquinas, whose system of thought is known as Thomism. His thought is, in essence, a synthesis of Christian theology and the philosophy of Aristotle. Aristotle describes man as a "rational animal," i.e., a single, undivided being that is at once animal (material) and rational (intellectual soul). Drawing from Aristotelian hylomorphism, The soul is seen as the substantial form of the body (matter). The soul, as the substantial form, is what is universal, or common, to all humanity, and therefore, is indicative of human nature; that which differentiates one person from another is matter, which Aquinas refers to as the principle of individuation. The human soul is characterized as spiritual, immortal, substantial, and subsistent: it is the spiritual and vital principle of the human being, but is also dependent on the body in a variety of ways in order to possess these characteristics. Thus, no division is made between the "physical" and the "spiritual," though they are in fact distinct. This position differentiates Thomism from both materialism and idealism. Unlike idealism, it holds that the visible universe is not a mere shadow of a transcendent reality, but instead is fully real in and of itself. However, unlike materialism, Thomism holds that empiricism and philosophy, when properly exercised, lead inevitably to reasonable belief in God, the human soul, and moral objectivism. Thus, to a Thomist, it is obvious from the evidence that there is a God and an eternal soul.