The trenchant blade, Toledo trusty,
For want of fighting was grown rusty,
And ate into itself, for lack
Of somebody to hew and hack.

These lines are from Samuel Butler’s satirical mock-epic poem *Hudibras* (1663–1678), written in the aftermath of the English Civil Wars and the Interregnum. Butler uses the adventures of the Puritan knight Sir Hudibras to lampoon religious zealotry, political hypocrisy, and the pretensions of would‑be heroes. The “Toledo” blade invokes the famed Spanish sword-making city, a conventional emblem of martial excellence. Butler’s joke is that a weapon made for combat has been left unused so long that it metaphorically turns its destructive energy inward—an image that fits *Hudibras*’ broader theme of misdirected aggression and the absurdity of postwar posturing.

Butler personifies the sword to suggest that instruments (and, by extension, people or institutions) designed for conflict can become self-damaging when deprived of their intended outlet. The “trenchant blade” is “trusty” and formidable, yet inactivity makes it “rusty,” and the pent-up purpose “ate into itself.” In the comic logic of *Hudibras*, this is both a literal image of corrosion and a moral satire: belligerence without a proper object curdles into self-harm. The passage can be read more broadly as a warning about unused capacities—whether martial, intellectual, or emotional—turning inward into frustration, decay, or self-sabotage.