Final answer:
Dualism is the belief that humans are composed of both physical and spiritual substances. The difference between present and future bodies is not a difference between material and spirit, but between mortality and immortality, physical and metaphysical, earthly and heavenly, and finite and infinite.
Step-by-step explanation:
Dualism is the belief that humans are composed of both physical substance (body) and spiritual substance (soul). It posits that the body and soul are separate entities and exist in two different realms: the physical and the non-physical. Therefore, the difference between our present and future bodies is not a difference between material and spirit, but rather between mortality and immortality, physical and metaphysical, earthly and heavenly, and finite and infinite.