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as a dog returns to his vomit, so a fool repeats his folly

Foolish people are apt to repeat their missteps. A: "I can't believe Sarah is going skiing again, after she broke her leg the last time." B: "Well, as a dog returns to his vomit, so a fool repeats his folly."
See also: dog, folly, fool, repeat, return

repeat (oneself)

To repeat what one has previously done or stated. Be sure to take detailed notes, because I will not repeat myself. People surprised at the sudden shift in public opinion would do well to remember that history tends to repeat itself.
See also: repeat

History repeats itself.

Prov. The same kinds of events seem to happen over and over. It seems that history is about to repeat itself for that poor country; it is about to be invaded again. Alan: The country is headed for an economic depression. Jane: How do you know? Alan: History repeats itself. The conditions now are just like the conditions before the last major depression.
See also: history, itself, repeat

repeat oneself

Express oneself in the same way or with the same words, as in Grandma forgets she has told us this story before and repeats herself over and over, or This architect tends to repeat himself-all his houses look alike. A well-known version of this idiom is the proverb History repeats itself, first recorded (in English) in 1561. For example, Her mother also married when she was 18-history repeats itself. [Mid-1800s]
See also: repeat
References in periodicals archive ?
Little is known either about the practices of laboratories that have a policy of repeating critical values, or about the utility of repeat analysis (reproducibility).
Because the unusual spacing evident in quasicrystals cannot result from a simply repeating unit cell, researchers turned to alternative structural models.
Repeating Arms Corporation and not the Winchester name itself.
Until recently, however, materials scientists could not explain how the atoms of these quasicrystals could assemble themselves into such a complex arrangement rather than the regularly repeating pattern of a crystal.
The Heidrun project began in mid-June and is repeating a Q(a) baseline survey acquired by WesternGeco in 2001.
Repurposing'' network series - repeating them on affiliated cable channels within a few days or weeks after they've aired on the broadcaster that developed it - will be practiced even more in the future, for reasons both economic and creative, suggested Jamie Kellner, chairman and CEO of Turner Broadcasting, who also oversees the WB network.
As researchers traced this unstable DNA through family trees, they found that the repeating portion was often larger in each new generation.
LANCASTER - Lancaster School District eighth-graders who fail to graduate could have the option of attending a proposed charter high school to avoid repeating the eighth-grade, charter school organizers said.
Larger repeating bits, called minisatellites, can also cause problems, says Theodore G.
They made enough kinds of short, 20nucleotide fragments to cover all possible repeating threesome combinations.
But the pattern's unusual fivefold symmetry suggested that the atoms could not lie in one of the orderly arrangements of repeating units, or building blocks, conventionally assigned to crystals.