The influence exercised over the human mind by apt analogies is and has always been immense. Whether they translate an established truth into simple language or whether they adventurously aspire to reveal the unknown, they are among the most formidable weapons of the rhetorician.
Winston Churchill (1874-1965) British statesman and author
“The Scaffolding of Rhetoric” (Nov 1897)
(Source)
Commonly abridged, "Apt analogies are among the most formidable weapons of the rhetorician."