We should understand the world in which we live, note the changes taking place in its chief modes of thought, and make a definite contribution toward bringing ultimate spiritual perfection to light. The three outstanding means of mortal thought—science, theology, and medicine— are being transformed as humanity rises from a material to a spiritual basis of life. Christ Jesus must have had this transformation in mind when he likened the kingdom of heaven to "leaven, which a woman took and hid in three measures of meal, till the whole was leavened" (Luke 13:21).
Many today realize that the leaven of the Master's parable is Divine Science, the Comforter, which he prayed the Father to send to mankind. Mary Baker Eddy makes this explanation in "Science and Health with Key to the Scriptures" (p. 118): "In their spiritual significance, Science, Theology, and Medicine are means of divine thought, which include spiritual laws emanating from the invisible and infinite power and grace. The parable may import that these spiritual laws, perverted by a perverse material sense of law, are metaphysically presented as three measures of meal,—that is, three modes of mortal thought."
By reversing the "perverse material sense of law" inherent in the mortal modes of science, theology, and medicine, Christian Science demonstrates God's laws, which operate ceaselessly to express the truth. Nothing can actually abrogate divine laws, and if mortal modes seem to do so, this seeming is suppositional. By means of His laws, God acts to create and govern man and to make him perfect—in His likeness. Through true Science, God provides man with dominion, constitutes him of spiritual elements, and endows him with powers which exclude limitation.
