As a

metaphor A metaphor is a figure of speech that, for rhetorical effect, directly refers to one thing by mentioning another. It may provide (or obscure) clarity or identify hidden similarities between two different ideas. Metaphors are often compared wit ...

, a touchstone refers to any physical or intellectual measure by which the validity or merit of a concept can be tested. It is similar in use to an

acid test Acid test or acid tests may refer to: Scientific or metallurgical test *Acid test (gold), a chemical or metallurgical test that uses acid, now also a general term for ''verified'', ''approved'', or ''tested'' in a large number of fields *Acid te ...

, litmus test in politics, or, from a negative perspective, a

shibboleth A shibboleth (; hbo, , šībbōleṯ) is any custom or tradition, usually a choice of phrasing or even a single word, that distinguishes one group of people from another. Shibboleths have been used throughout history in many societies as passw ...

where the criterion is considered by some to be out-of-date. The word was introduced into literary criticism by

Matthew Arnold Matthew Arnold (24 December 1822 – 15 April 1888) was an English poet and cultural critic who worked as an inspector of schools. He was the son of Thomas Arnold, the celebrated headmaster of Rugby School, and brother to both Tom Arnold, li ...

in "Preface to the volume of 1853 poems" (1853) to denote short but distinctive passages, selected from the writings of the greatest poets, which he used to determine the relative value of passages or poems which are compared to them. Arnold proposed this method of evaluation as a corrective for what he called the "fallacious" estimates of poems according to their "historic" importance in the development of literature, or else according to their "personal" appeal to an individual critic.

Origin of the term

A touchstone is a small tablet of dark stone such as

fieldstone Fieldstone is a naturally occurring type of stone, which lies at or near the surface of the Earth. Fieldstone is a nuisance for farmers seeking to expand their land under cultivation, but at some point it began to be used as a construction mate ...

slate Slate is a fine-grained, foliated, homogeneous metamorphic rock derived from an original shale-type sedimentary rock composed of clay or volcanic ash through low-grade regional metamorphism. It is the finest grained foliated metamorphic ro ...

, or lydite, used for

assay An assay is an investigative (analytic) procedure in laboratory medicine, mining, pharmacology, environmental biology and molecular biology for qualitatively assessing or quantitatively measuring the presence, amount, or functional activity of ...

ing

precious metal Precious metals are rare, naturally occurring metallic chemical elements of high economic value. Chemically, the precious metals tend to be less reactive than most elements (see noble metal). They are usually ductile and have a high lu ...

alloy An alloy is a mixture of chemical elements of which at least one is a metal. Unlike chemical compounds with metallic bases, an alloy will retain all the properties of a metal in the resulting material, such as electrical conductivity, ductilit ...

s. It has a finely grained surface on which soft

metal A metal (from Greek μέταλλον ''métallon'', "mine, quarry, metal") is a material that, when freshly prepared, polished, or fractured, shows a lustrous appearance, and conducts electricity and heat relatively well. Metals are typi ...

s leave a visible trace.

In literature

An example in literature is the character of

Touchstone Touchstone may refer to: * Touchstone (assaying tool), a stone used to identify precious metals * Touchstone (metaphor), a means of assaying relative merits of a concept Entertainment * ''Touchstone'' (album), a 1982 album by Chick Corea * T ...

in Shakespeare's ''

As You Like It ''As You Like It'' is a pastoral comedy by William Shakespeare believed to have been written in 1599 and first published in the First Folio in 1623. The play's first performance is uncertain, though a performance at Wilton House in 1603 has ...

'', described as "a wise fool who acts as a kind of guide or point of reference throughout the play, putting everyone, including himself, to the comic test". :Dante's "In la sua volontade è nostra pace" ("In his will is our peace"; Paradiso, III.85) A touchstone can be a short passage from recognized masters' works used in assessing the relative merit of poetry and literature. This sense of the term was coined by Matthew Arnold in his essay "The Study of Poetry", where he gives Hamlet's dying words to Horatio as an example of a touchstone.Arnold, Matthew. "The Study of Poetry." Essays: English and American. Ed. Charles W. Eliot. 1909–14. Published April 11, 2001 by Bartleby.co

In German politics

Germany Germany, officially the Federal Republic of Germany (FRG),, is a country in Central Europe. It is the most populous member state of the European Union. Germany lies between the Baltic and North Sea to the north and the Alps to the sou ...

, various

interest group Advocacy groups, also known as interest groups, special interest groups, lobbying groups or pressure groups use various forms of advocacy in order to influence public opinion and ultimately policy. They play an important role in the developm ...

s sometimes send questionnaires to the campaigning political parties before federal parliament elections. These questionnaires, consisting of political survey questions the interest groups are interested in, are often called "electoral touchstones" (''German:'' Wahlprüfsteine). Those answers of a political party which might support or threaten the political goals of an interest group are finally published by the group in order to influence the voting behavior of potential voters being in favor of the political views of the interest group.

Notes

{{reflist Metaphors