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The "Shield of the Trinity" Diagram

This traditional diagram (dating back to the Christian iconography or symbolism of the early 13th century AD) provides a compact convenient visual summary of the first half of the Athanasian creed, expressing certain aspects of the orthodox Christian doctrine of the Trinity as six non-contradictory logical propositions within a non-transitive logic. (With a non-transitive quasi-equivalence relation, "A is equivalent to C" does not follow from the two statements "A is equivalent to B" and "B is equivalent to C".) So this roughly 800-year-old diagram contains an implicit anticipation of some aspects of modern studies of alternative logical systems.

I have color-coded the diagram below so that a red link means non-predication (non-equivalence) and a link with black text indicates predication (equivalence). Quasi-equivalence is still logically symmmetrical (though not transitive), so that all links are inherently bidirectional (two-way).

Click on the small PNG thumbnail of the original Latin version of the diagram below to view a larger GIF version, which includes side-by-side English-language translations of the Latin captions, and a list of the six non-contradictory logical assertions contained in the diagram (accompanied by decorative trinitarian motifs); or view the corresponding small vector Adobe PDF file:	Click below for a vector SVG version of the "Shield of the Trinity" diagram, with interactive switching between English/Latin captions and Arabic captions (if your SVG-viewer has simple scripting abilities -- click on the blue rectangle to switch between languages): ‏«ترس الإيمان‏»‏ : شعار الثالوث المسيحي (النصراني)

[Bilingual English-Arabic diagram contrasting the Christian Trinity with the pseudo-Trinity of the Qur'an.]

The SVG file linked in the table above won't work in version 1.0 of Adobe SVG Viewer plugin (which claimed to be compatible with the eighth pre-release of the SVG standard on 3/3/0, but unfortunately ignored "Exchange SVG" syntax); update to a more recent version instead. If you encounter server MIME-type problems, save the SVG file to your local disk (with a name ending in ".svg"), and view it from there.

For other versions of the Shield of the Trinity diagram with Arabic-language captions (including an explanation of the difference between the Christian Trinity and the pseudo-Trinity which Muhammad denounces in the Qur'an), see the appropriate section of the Symbolic Truth site main page (or view this small PDF file).

Also, there is a page on the most accurate version of the name of Jesus in Arabic and other languages, and the Tengwar Arabic Mode writing system for the Arabic language.

The images below illustrate other historical versions of this diagram (for resizable vector versions of these, see the second and third pages of the same Adobe PDF file linked above). A shield-shaped version of the diagram on a red shield was considered to be the heraldic arms of God (or of the Trinity) in medieval England and France. For further details, now see the Wikipedia article on the Shield of the Trinity or Scutum Fidei.

[Heraldic Arms of God (Gules) - Historical variants of the Shield of the Trinity diagram or `Scutum Fidei' PATER FILIUS SPIRITUS SANCTUS NON EST DEUS EST]

[Heraldic arms of the Anglican bishopric (diocese) of Trinidad, showing cross, Alpha and Omega, and Shield of the Trinity. Blazon: ``Azure, a long cross flory Or, surmounted of a representation of the emblem of the Holy and Undivided Trinity argent, the lettering sable, between the two Greek letters Alpha and Omega gold.'']

[Coat of Arms of Trinity parish, Jersey (British channel islands), with abbreviated version of the Shield of the Trinity diagram on green shield (heraldic vert)]

[Decorative ornamental Trinity knot - Triquetra interlaced with circle]

An SVG version of the coat of arms of the Anglican diocese of Trinidad is available.