The Mother Church, First Church of Christ, Scientist, Boston, Massachusetts
Examining Christian Science
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Is Science and Health an authoritative key to the Bible?

Reviewed 2026-09-26

Science and Health with Key to the Scriptures is Mary Baker Eddy's central book, and its full title makes a specific claim: that it functions as a key needed to correctly open up what the Bible means.

That claim is not incidental to Christian Science. The Manual of its own Mother Church formally ordains "the Bible, and Science and Health" together as the church's Pastor — the same standing, held jointly by both books.

The Berea does not recognize Science and Health as inspired Scripture, divine revelation, or an authoritative key for interpreting Scripture.

This is not a judgment about Mary Baker Eddy's sincerity, and it does not depend on any single disputed reading. It is a judgment about whether Scripture needs, or ever authorizes, a later book to stand alongside it in that role — and Scripture speaks to that question directly.

A book can be read seriously, even reverently, by a religious community without holding the authority its own title claims for it. Whether Science and Health's specific readings of Scripture hold up once tested against the text is a separate question, examined on the companion page asking whether Christian Science is biblical Christianity.

Examine it for yourself

The evidence, the interpretations and the conclusion, separated so you can examine each step. Every passage is linked; read them in context.

What the title itself claims

"Key to the Scriptures" is not a nickname supplied by outsiders — it is the second half of the book's own full title, chosen by Mary Baker Eddy herself. A book can be influential, sincerely written, and widely read within a religious community without its own chosen title being an accurate description of its authority over Scripture. That distinction — between what a book claims for itself and what it has actually earned the right to claim — is what this page examines.

    What they teach

    Stated accurately, on its own terms, then examined against Scripture.

    Mary Baker Eddy's Church Manual formally ordains both books together: "I, Mary Baker Eddy, ordain the Bible, and Science and Health with Key to the Scriptures, Pastor over The Mother Church, The First Church of Christ, Scientist, in Boston, Mass., and they will continue to preach for this Church and the world." Science and Health's own subtitle and official Christian Science material describe the book as what "helps unlock the Bible's spiritual, healing message."

    The Berea’s response

    Scripture claims sufficiency for itself without needing a second, later book to function alongside it as its interpreter: "every Scripture is God-breathed and profitable for teaching, for reproof, for correction, and for instruction in righteousness, that each person who belongs to God may be complete, thoroughly equipped for every good work" (2 Timothy 3:16-17) — sufficient to make a person of God complete and thoroughly equipped, not partially equipped pending a later key. Paul states the same principle even more sharply when a different kind of authority is proposed: "even though we, or an angel from heaven, should preach to you any 'good news' other than that which we preached to you, let him be cursed" (Galatians 1:8). No standing is claimed here for Science and Health that exceeds what has already been examined for other traditions on this site — that a book's title, its official standing within a church, or the sincerity of its author does not itself grant it interpretive authority over Scripture. What has to be shown, case by case, is whether the readings that book produces agree with what Scripture says — and the other Christian Science question on this site examines several of those readings directly.

    • 2 Timothy 3:16-17

      Scripture is described as sufficient in itself to equip a person of God for every good work.

    • Galatians 1:8

      Even an authoritative-sounding source proclaiming something different from the gospel already given is to be rejected, not deferred to.

    Examine it deeper

    That Mary Baker Eddy's Church Manual ordains "the Bible, and Science and Health with Key to the Scriptures" jointly as "Pastor" of The Mother Church is a matter of public record, quoted directly from the Manual's own text. That Science and Health's full title calls itself a "Key to the Scriptures" is likewise not in dispute — it is the book's own name.

    Conclusion · strong

    What the evidence supports

    Science and Health with Key to the Scriptures is not an authoritative key to the Bible, whatever standing it holds within Christian Science itself.

    Scripture describes itself as sufficient to equip a person of God for every good work, without requiring a later book to unlock its meaning, and warns against deferring to a different authority — even an authoritative-sounding one — over the gospel already given. A church's own ordination of a later book as joint "Pastor" alongside the Bible does not itself grant that book interpretive authority. Therefore The Berea rejects Science and Health's claimed status as a key to the Scriptures.

    Examine further

    • Jude 1:3

      "The faith which was once for all delivered to the saints" — a settled deposit, not one requiring a later key.

    Discuss and study

    1. Does a book's sincerity, or its long use within a religious community, establish its authority to interpret Scripture?
    2. What would you expect a genuinely authoritative "key to the Scriptures" to do differently than simply agreeing with what Scripture already says?
    Biblical foundation
    What does the Bible teach about its own authority? →
    Continue examining Christian Science
    What does Christian Science teach about Jesus Christ? →

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