Christ Jesus said, "I and my Father are one." As did our Master, so must every Christian Scientist relinquish the sense of a selfhood apart from God, of a mind distinct from the one Mind.
In her textbook, "Science and Health with Key to the Scriptures" (p. 591), Mary Baker Eddy, the inspired Discoverer and Founder of Christian Science, defines "Mind" as follows: "The only I, or Us; the only Spirit, Soul, divine Principle, substance, Life, Truth, Love; the one God; not that which is in man, but the divine Principle, or God, of whom man is the full and perfect expression; Deity, which outlines but is not outlined." And of the "I, or Ego," she says in part (p. 588), "There is but one I, or Us, but one divine Principle, or Mind, governing all existence; man and woman unchanged forever in their individual characters, even as numbers which never blend with each other, though they are governed by one Principle."
The understanding of but one Mind, God, and of man as the compound idea or embodiment of infinite Spirit, is sufficient for all mankind. Despite the testimony of the material senses, there are not many minds. The belief that every so-called mortal has a separate mind or intelligence, possessing a private body, is the supposititious I of material personality, which is heir to sin, sickness, and death. To part with that belief and its dire consequences we must, of course, recognize the divine Mind as the only I, or Ego. In so far as this is accomplished, we can prove that "now are we the sons of God," and the recipients of health, abundance, and harmony.