fool me once, shame on you; fool me twice, shame on me

== English == === Alternative forms === fool me once, shame on thee; fool me twice, shame on me === Pronunciation === === Proverb === fool me once, shame on you; fool me twice, shame on me After being tricked once, one should learn from one's mistakes and avoid being tricked in the same way another time. ==== Translations ==== === See also === as a dog returns to his vomit, so a fool repeats his folly