John Quincy Adams, answered from the texts and cited to the page.
The science resolves itself into five constituent parts: invention, disposition, elocution, memory, and pronunciation — or, as it is sometimes called, action. Invention is the finding of the arguments a case affords — the materials, so to speak, before they have been given any shape. Disposition is the orderly arrangement of those materials once found; Cicero's own definition, to which I have referred my students, is precisely that: the ordered arrangement of the things invented.12
Without disposition, invention is chaos — the raw mass of mingled elements before the creation of light, before the division of light from darkness, which was the first thing the Supreme Creator saw to be good. Elocution is the matter of style — the clothing the thought receives, the question of purity, of precision, of the fitness of words to the occasion. Memory is what raises the orator above the reader of a manuscript; it is an operation of the mind that has never yet been fully explained, though the poets of Greek mythology personified it as a goddess, Mnemosyne, daughter of heaven and of earth, and mother of all the muses. Pronunciation, or action, is the last — the delivery itself, the voice and the body brought to bear upon the hearer.34567
Aristotle and the Grecian masters reckoned three of these — invention, disposition, and elocution — as comprehending the whole science; memory and pronunciation were superadded by more recent teachers.8 I do not quarrel with the addition. A man who has found his arguments, arranged them, and clothed them well, but cannot remember them or give them life in delivery, has built a house he cannot enter.
the whole science of rhetoric was divided into five constituent parts; invention, disposition, elocution, memory, and pronunciation or action.Lectures on Rhetoric and Oratory, Vol 1
Under that of invention were considered the topics, internal and external; the state of a controversy; the arguments proper to demonstrative, deliberative, judicial, and pulpit discourses, respectively.Lectures on Rhetoric and Oratory, Vol 2
Disposition, according to the definition of Cicero, to which I formerly referred you, is 'the orderly arrangement of the things invented.'Lectures on Rhetoric and Oratory, Vol 1
To shape this chaos into form, to give the original mass of mingled elements an existence for use or beauty, the principle of order must be introduced; as the creation of light immediately succeeded that of matter; and the division of light from darkness was the first thing, which the Supreme Creator saw to be good.Lectures on Rhetoric and Oratory, Vol 1
The introduction, narration, proposition, confirmation, confutation, and conclusion, have been in due succession submitted to our scrutiny; nor have the occasional incidents of digression, transition, and amplification, been neglected.Lectures on Rhetoric and Oratory, Vol 2
Memory, say the poets of the Grecian mythology, is a goddess. Her name is Mnemosyne. She is the daughter of heaven and of earth; and, impregnated by Jupiter, she was the mother of all the muses.Lectures on Rhetoric and Oratory, Vol 2
invention, disposition, elocution, memory, and pronunciation or action. All which terms I endeavoured to explain in such a manner, that your ideas of their import might be clear and precise.Lectures on Rhetoric and Oratory, Vol 1
We have at length travelled through the three great divisions of rhetoric, which, according to the distribution of Aristotle and others of the Grecian masters, comprehend the whole science; invention, disposition, and elocution. The two remaining branches, memory and pronunciation, which have been superadded by more recent teachers.Lectures on Rhetoric and Oratory, Vol 2