“The study of rhetoric distiguishes between tropes, or figuresvof meaning such as metaphor and metonymy, and schemes, or surface patterns of words. Poetry is a matter of trope; and verse, of scheme or design.”

Canto I, line 81
Hudibras, Part I (1663–1664)
Context: For rhetoric, he could not ope
His mouth, but out there flew a trope;
And when he happen'd to break off
I' th' middle of his speech, or cough,
H' had hard words, ready to show why,
And tell what rules he did it by;
Else, when with greatest art he spoke,
You'd think he talk'd like other folk,
For all a rhetorician's rules
Teach nothing but to name his tools.

11C.21
"Quotes", Notebooks

Come ordine era dato, il tutto avvenne,
Che 'l consiglio del mal va raro invano.
Canto XXI, stanza 48 (tr. W. S. Rose)
Orlando Furioso (1532)

On Truth and Lie in an Extra-Moral Sense (1873)
Context: What then is truth? A movable host of metaphors, metonymies, and anthropomorphisms: in short, a sum of human relations which have been poetically and rhetorically intensified, transferred, and embellished, and which, after long usage, seem to a people to be fixed, canonical, and binding. Truths are illusions which we have forgotten are illusions — they are metaphors that have become worn out and have been drained of sensuous force, coins which have lost their embossing and are now considered as metal and no longer as coins.

Source: Death in Florence (1978), Chapter 2 “A New Mann” (p. 99).

Source: The Classification Research Group 1952—1962 (1962), p. 133 as cited in:

page 19
Breakfast of Champions (1973)

We never do that, do we, being all of us too much poets. We like to talk in parables and in hints and in indirections — whether from diffidence or some other instinct.
" Education by Poetry http://www.en.utexas.edu/amlit/amlitprivate/scans/edbypo.html", speech delivered at Amherst College and subsequently revised for publication in the Amherst Graduates’ Quarterly (February 1931)
General sources

The Necessary Angel (1951)