Consider that in mathematics you have a system of ten digits, 0-9, that are governed by the four methods of addition, subtraction, multiplication and division. When the principle is employed properly one achieves a harmonious answer; when it is not the solution is in error. The principle expressed in mathematics has always been here. It is made practical with the application of enlightened thought.
Music utilizes a system, or science, of seven notes, do, re, mi, fa, so, la, te (notes C, D, E, F, G, A, B), governed by the four means of expression, tone, rhythm, melody and harmony. Expressed in an harmonious way, concord is produced; in an inharmonious way, discord.
There is a similar divine Science of Life, or Principle of Being; this Principle, if understood properly, leads to harmony in the life of man. Divine Science is composed of a system of seven synonyms for Deity: Mind, Spirit, Soul, Principle, Life, Truth, Love. Understanding these attributes, as they relate to man--in the "image and likeness" of God--takes on meaning and results in true health.
Please see the chapter on "Recapitulation" in Science and Health with Key to the Scriptures, by Mary Baker Eddy, for a complete treatment of this topic.