Current theories of medicine and biology define many of the physical difficulties associated with passing years as breakdowns in bodily functions. A material mentality argues that keeping fit may become increasingly difficult, that one's energy and vitality can no longer be consistently maintained. These appearances originate in the view that life is essentially organic, material, and mechanical. Consequently, the mortal mechanism, by definition, eventually slows down, wears out. But this view denies man's true identity as the likeness of Spirit.
Contrary to the spurious testimony of the physical senses, God's law affirms His ever-present government of all activity. This law upholds man in an endless continuity of perfect life and identity. According to the law of divine maintenance, the ongoing, coexistent relationship of perfect cause (God) and perfect effect (man) remains intact and unshaken. God, divine Mind, could not express Himself in ideas that are perfect at the outset but do not remain so. Again, the coexistence of Principle and idea—God and man—is invariable. The Bible in one instance refers to God as "the Father of lights, with whom is no variableness, neither shadow of turning."James 1:17.
Then, what of the sons and daughters of the Father? There can be no variableness, no changing or diminishing capacities, no periods of decay and disrepair. The Father-Mother has not fostered a creation and subsequently turned away, leaving that creation to its own uncertain devices—to decline and fade out. The permanent unity of God and man can't be breached. God's creation is neither mortal nor material, but spiritual and immortal.