Ancient rhetorical theory distinguished between form and content.As Gordon Williams states in introducing his study Figures of Thought in Roman Poetry (1980): " Language was subject to ordering by exhaustive description of vocabulary, syntax, and figures. The content was likewise subject to ordering by the rules of inventio (the technique by which all the latent or inherent possibilities in a given idea or cluster of ideas could be 'discovered' and exploited). " The concept of figures of speech has become common, and virtually any reader can retrieve a definition of " figure of speech " . When it comes to describing a figure of thought, the task is not as comfortable as we might wish, especially when our  primary area of inquiry is poetry rather than a prose composition, which adheres to the rules of rhetorical theory that were for the most part created in their fullest articulation in the age of Quintilian (c. 35 – c. 100). In their approach to language, the Roman poets (Horace, Catullus, Propertius, Tibullus) did not distinguish between inventio and elocutio, which explains somewhat our confusion between figures of thought and figures of speech. The latter are exemplified most immediately by conceptual substitutions, such as metaphor or synecdoche, but if we consider not just the mere linguistic aspect of the substitution and focus most closely on the concepts themselves, then we might begin to perceive the comprehensiveness of the conceptual for the poet, who operates with words to extend and amplify the potential semantics of poetic output. In other words, if the poet says " stars" to mean " eyes "     , on the linguistic level we witness a conceptual substitution that plays on the gleaming of stars to describe human eyes, and thereby the object described acquires greater detail and more seductive features. The resulting effect of the substitution, however, also includes a fusion of concepts because the gleaming of stars and the gleaming of eyes are added to one another in thought, and the resulting meaning is a new and more potent concept than the one available in the two separate concepts of stars and eyes, for after qualifying the eyes of a beloved as stars, the whole universe becomes readable in the beloved's eyes, and the eyes of the beloved watch us from above on any given night.
A figure of thought (, ) is a rhetorical device sometimes distinguished from figure of speech.Gideon O. Burton, "Figures of speech/figures of thought", Silva Rhetoricae, Brigham Young University In another sense the term has been used in the study of diagrams and drawings.Gerhard Dirmoser, " Figures of Thought: The Use of Diagrams in Science and Art " , in " Drawing a Hypothesis " , pp. 153-160 Application to Latin literature It may be difficult to draw the distinction between figures of speech and figures of thought, especially when the primary area of inquiry is poetry rather than a prose composition, which adheres to the rules of rhetorical theory that were for the most part created in their fullest articulation in the age of Quintilian (c. 35 – c. 100). In their approach to language, the Roman poets (Horace, Catullus, Propertius, Tibullus) did not distinguish between inventio and elocutio, which explains somewhat our confusion between figures of thought and figures of speech. The latter are exemplified most immediately by conceptual substitutions, such as metaphor or synecdoche, but if we consider not just the mere linguistic aspect of the substitution and focus most closely on the concepts themselves, then we may perceive the comprehensiveness of the conceptual for the poet, who operates with words to extend and amplify the potential semantics of poetic output. Uses of the term Ananda Coomaraswamy used the term in relation to the philosophy of Plato: " Plato’s dialectic makes continual use of figures of speech, which are really figures of thought. " " A Figure of Speech, or a Figure of Thought?", Studies in Comparative Religion, Vol. 6, No. 1, Winter 1972 The scholar of Latin literature Gordon Williams (died 2010)"Gordon Williams: Scholar who introduced many to the pleasures of Latin poetry" (obituary), The Times (London), 29 September 2010 published a study titled Figures of Thought in Roman Poetry (1980), stating in the introduction: "Language was subject to ordering by exhaustive description of vocabulary, syntax, and figures. The content was likewise subject to ordering by the rules of inventio (the technique by which all the latent or inherent possibilities in a given idea or cluster of ideas could be 'discovered' and exploited)." A collection of drawings by Nikolaus Gansterer (2011) was titled "Drawing a Hypothesis: Figures of Thought"."Drawing a Hypothesis: Figures of thought" , a-n The Artists Information Company, 19 April 2012
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Ancient rhetorical theory distinguished between form and content.As Gordon Williams states in introducing his study Figures of Thought in Roman Poetry (1980):
A figure of thought (, ) is a rhetorical device sometimes distinguished from figure of speech.Gideon O. Burton, "Figures of speech/figures of thought", Silva Rhetoricae, Brigham Young University In another sense the term has been used in the study of diagrams and drawings.Gerhard Dirmoser,
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Language was subject to ordering by exhaustive description of vocabulary, syntax, and figures. The content was likewise subject to ordering by the rules of inventio (the technique by which all the latent or inherent possibilities in a given idea or cluster of ideas could be 'discovered' and exploited).
Figures of Thought: The Use of Diagrams in Science and Art
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The concept of figures of speech has become common, and virtually any reader can retrieve a definition of
, in
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figure of speech
Drawing a Hypothesis
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. When it comes to describing a figure of thought, the task is not as comfortable as we might wish, especially when our
, pp. 153-160
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Application to Latin literature It may be difficult to draw the distinction between figures of speech and figures of thought, especially when the
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might begin to
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In other words, if the poet says
Uses of the term Ananda Coomaraswamy used the term in relation to the philosophy of Plato:
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stars" to mean
Plato’s dialectic makes continual use of figures of speech, which are really figures of thought.
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eyes
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A Figure of Speech, or a Figure of Thought?", Studies in Comparative Religion, Vol. 6, No. 1, Winter 1972
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The scholar of Latin literature Gordon Williams (died 2010)"Gordon Williams: Scholar who introduced many to the pleasures of Latin poetry" (obituary), The Times (London), 29 September 2010 published a study titled Figures of Thought in Roman Poetry (1980), stating in the introduction:
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"Language was subject to ordering by exhaustive description of vocabulary, syntax, and figures. The content was likewise subject to ordering by the rules of inventio (the technique by which all the latent or inherent possibilities in a given idea or cluster of ideas could be 'discovered' and exploited)."
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A collection of drawings by Nikolaus Gansterer (2011) was titled "Drawing a Hypothesis: Figures of Thought"."Drawing a Hypothesis: Figures of thought"
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on the linguistic level we witness a conceptual substitution that plays on the gleaming of stars to describe human eyes, and thereby the object described acquires greater detail and more seductive features. The resulting effect of the substitution, however, also includes a fusion of concepts because the gleaming of stars and the gleaming of eyes are added to one another in thought, and the resulting meaning is a new and more potent concept than the one available in the two separate concepts of stars and eyes, for after qualifying the eyes of a beloved as stars, the whole universe becomes readable in the beloved's eyes, and the eyes of the beloved watch us from above on any given night.
a-n The Artists Information Company, 19 April 2012