fool me once, shame on you; fool me twice, shame on me (English, proverb)
expansion: fool me once, shame on you; fool me twice, shame on me
Senses:
glosses: After being tricked once, one should learn from one's mistakes and avoid being tricked in the same way another time.
Forms:
form: fool me once, shame on thee; fool me twice, shame on me
tags: alternative