Looking up the verb "to nurse" in the Duden etymological dictionary of the German language, I found that its original meaning is "to stand up for, commit oneself to something." From this definition ring undertones of steadfastness, conviction, loyalty, reliability, and honesty—qualities that can make Christian Science nursing particularly valuable.
In the Manual of The Mother Church, Mary Baker Eddy has provided for the activity of Christian Science nursing. Article VIII, Section 31, states, in part: "A member of The Mother Church who represents himself or herself as a Christian Science nurse shall be one who has a demonstrable knowledge of Christian Science practice, who thoroughly understands the practical wisdom necessary in a sick room, and who can take proper care of the sick." The idea of nursing and its practical execution are established on and governed by this By-Law. The three keystones—a demonstrable knowledge of Christian Science practice, practical wisdom, and taking proper care—build upon each other. A demonstrable knowledge automatically leads to practical wisdom, and this leads to proper care.
We could say that a demonstrable knowledge of Christian Science practice is the cornerstone of true care. If this cornerstone is missing, true nursing care as understood in Christian Science is not being given. When this knowledge is present, the fruits of which Christian Science is capable, namely genuine healings, will appear.