The English language is rich with great sayings steeped in history.

I like this one for the historical implications.

"Hoist with his own petard."

A petard was a small bomb used to blow up gates and walls when breaching fortifications. The term has a French origin and dates back to the sixteenth century. In a typical implementation, it was commonly either a conical or rectangular metal object containing 5 or 6 pounds of gunpowder, activated with a slow match used as a fuse.

The word petard comes from the Middle French peter, to break wind, from pet expulsion of intestinal gas, from Latin peditum, from neuter of peditus, past participle of pedere, to break wind; akin to Greek bdein to break wind. (Merriam-Webster) Petard remains a French word meaning a firecracker today (in French slang, it means a handgun, or a joint).

The word remains in modern usage in the phrase hoist with one's own petard, which means "to be harmed by one's own plan to harm someone else" or "to fall into one's own trap," literally implying that one could be lifted up (hoist, or blown upward) by one's own bomb.


If a petard were to detonate prematurely due to a faulty or short slow match, the engineer would be lifted or "hoist" by the explosion. William Shakespeare used the now proverbial phrase "hoist with his own petard" in Hamlet.

In the following passage, the "letters" refer to instructions (written by his uncle Claudius, the King) to be carried sealed to the King of England, by Hamlet, Rosencrantz and Guildenstern, the latter being two schoolfellows of Hamlet. The letters, as Hamlet suspects, contain a death warrant against Hamlet, who will later open and modify them to instead request the execution of Rosencrantz and Guildenstern. Enginer refers to a military engineer, the spelling reflecting Elizabethan stress.
There's letters seal'd: and my two schoolfellows, Whom I will trust as I will adders fang'd, They bear the mandate; they must sweep my way And marshal me to knavery. Let it work; For 'tis the sport to have the enginer Hoist with his own petar; and 't shall go hard But I will delve one yard below their mines And blow them at the moon: O, 'tis most sweet, When in one line two crafts directly meet.

Does it get any better than that, I ask thee? :P