In the Christian Science textbook, "Science and Health with Key to the Scriptures," Mary Baker Eddy asks this stupendous question (p. 469): "What is Mind?" And with summary directness she replies in part: "Mind is God. The exterminator of error is the great truth that God, good, is the only Mind, and that the supposititious opposite of infinite Mind—called devil or evil—is not Mind, is not Truth, but error, without intelligence or reality." This absolute statement concerning Mind is one we must adhere to closely in order to demonstrate Christian Science.
Mind and memory—memory in the sense of knowledge or awareness—are inseparable. Proof of our oneness with Mind necessarily includes our ability to memorize. There is no bad mind, therefore no bad memory. If an imperfect mind seems to exist outside the one supreme, divine, infinite intelligence, it is an illusion. The degree to which we can prove the oneness, wholeness, and allness of Mind measures our understanding of God and man and ensures our dominion over any supposed loss of mind or memory.
Mind is not an abstraction. It includes all faculties through which man comprehends and apprehends creation. The entire creation is included in Mind because God's creation is the only creation and God is the only Mind. Whatever denies the perfect and spiritual creation, whatever places man outside God's perfect and intelligent universe, is hypothetical and can be proved so through Christian Science.