Simile

Bringing two different things together with an explicit word, such as "like," "just as," or "seems." Unlike the metaphor, the simile makes plain that there are two things.

In Don Quixote

as the proverb says, he who covers you uncovers you. Everyone glances over the poor man in passing, but lingers on the rich; and if that rich man was once poor, there is gossip and slander, and the worst of it is the persistence of the slanderers, who swarm through these streets by the heap, like bees in a swarm.

The slanderers, "by the heap, like swarms of bees," are compared to a swarm, and the image places the threat in the continuous, collective buzz rather than in any single voice.

Part Two: The Printed Book, Teresa Panza, to her husband, who wants to see their daughter a countess

note that love and war are the same thing, and just as in war it is lawful and customary to use ruses and stratagems to defeat the enemy, so in amorous contests and rivalries, deceptions and tricks done to achieve the desired end are deemed good, provided they are not to the harm and dishonor of the beloved. [...] Camacho is rich, and can buy his pleasure when, where, and how he likes. Basilio has only this one ewe lamb, and no one shall take it from him, however powerful; for what God joins together no man can separate.

Part Two: Mirrors, Lions, and Camacho, Don Quixote, to Camacho's partisans, after Basilio's trick

translating from one language into another, unless it is one of the queens of languages, Greek and Latin, is like looking at Flemish tapestries from the back, which, although the figures can be seen, are full of threads that darken them, and are not seen with the smoothness and finish of the right side.

Part Two: Ricote, Roque, and Barcelona, Don Quixote, at the Barcelona printing shop, to a man who translated a Tuscan book