In the tool and die industry accuracy is a must. The making of identical parts is known as precision work. In achieving the goal of accuracy a diemaker must learn to work to the close tolerances demanded by industry.

Likewise Mrs. Eddy demands accuracy of her followers. She writes, "If this Science has been thoroughly learned and properly digested, we can know the truth more accurately than the astronomer can read the stars or calculate an eclipse." ^{Science and Health, pp. 84-85;}

Christian Science treatment, also known as prayer, is ideally spiritually scientific "precision work." It recognizes the law of God, good, and denies that there is any power capable of separating man from his real Parent, God. I have come to see a helpful comparison between the work I was doing as a tool and die maker and the giving of a Christian Science treatment.

When learning to work with measuring tools one starts out with a scale and calipers and works to tolerances of one thirty-second and one sixty-fourth of an inch. As he progresses further in this field, he learns next to work with micrometers in thousandths of an inch and then in ten-thousandths of an inch. Thus his measuring becomes more precise.

In the textbook, Science and Health, Mrs. Eddy states, "The rule and its perfection of operation never vary in Science." ^{ibid., p. 149;} The Bible infers that God is All-in-all. Mrs. Eddy also presents seven synonyms, stated or implied in the Bible, defining God more clearly. They are Mind, Spirit, Soul, Principle, Truth, Life, and Love.

With this in mind, one could proceed to give a treatment in Christian Science. We might start with declarations relating to God's goodness. This can be likened to using fractional tolerances. We might affirm that God is Mind, Soul, Spirit, Principle, Life, Truth, and Love. This brings a more specific understanding of God's nature. We might think of it as comparable to working in thousandths of an inch. As our spiritual understanding grows, our treatments become more precise and better focused. Having magnified God in precise terms, we may continue the treatment by denying the specific discord or wrong.

Perhaps I can illustrate the importance of accurate denials with an experience. Several years ago while I was at work, a heavy piece of steel tipped over on my hand. Immediately I declared that there is no accident in Mind, God. Because there is only one Mind, man reflects this Mind and so cannot be injured in any way. The suggestion that I had to experience a swollen and discolored hand had to be corrected. Man as the representative of Soul is whole and without imperfection; therefore nothing can cause him to become discordant or imperfect.

I further realized that man's identity, reflecting divine Principle, cannot be damaged by mortal mind, or material sense, because the latter is unreal. The healing was complete, and in a very short time I was using my hand in a normal way.

Christ Jesus' statement "Ye shall know the truth, and the truth shall make you free" ^{John 8:32;} demands that we know the truth as precisely as we can. He evidently did, for he healed the blind, the dumb, the deaf, and the lame, and raised the dead.

In the Bible we read, "Every good gift and every perfect gift is from above, and cometh down from the Father of lights, with whom is no variableness, neither shadow of turning." ^{James 1:17.} Precise healing illustrates the nature of God as Principle, in which there is no variableness. And it excludes reliance on material means, demanding reliance on scientific prayer alone. It can be practiced by anyone who is willing to adhere closely to the rules of Christian Science.

Today, as in biblical times, the healing Christ, Truth, can be precisely applied with satisfactory results to diverse difficulties.