THE Christian Science Sunday School is an integral part of the Church of Christ, Scientist; for this reason the apprehension of the true concept of Church enables one to discern also the true concept of Sunday School. In turn, the correct concept of Sunday School inevitably results in harmonious and fruitful Sunday School activity.
Mary Baker Eddy gives in "Science and Health with Key to the Scriptures" the following definition of "Church" (p. 583):
"The structure of Truth and Love; whatever rests upon and proceeds from divine Principle.