The question, "Who am I?" is one which confronts everyone. Indeed it is a fundamental question because it involves an understanding of God and man. True self-identification is based on divine Principle. It is the spiritual fact of being.
Webster gives as one of the definitions of identification, "state of being identified," and of identity, "sameness with itself; self-sameness; oneness."
A most important word in the vocabulary of Christian Science is "one." In the Christian Science textbook, "Science and Health with Key to the Scriptures" by Mary Baker Eddy, we read (p. 267): "God is one. The allness of Deity is His oneness. Generically man is one, and specifically man means all men." The oneness of God is His infinite self-containment, including within Himself His infinite idea or self-expression. All that is going on, then, is going on within the all-inclusive oneness of Mind. Thus Christian Science reveals Principle and its idea one, one Being; God and man one, one selfhood infinitely reflected or expressed within His own infinite self-containment.