mend (one's) ways
To start behaving in a different, usually preferable, way. After I got in yet another fight at school, the headmaster told me that I had to mend my ways or else I'd be expelled. No matter how old you are, there is still time to mend your ways.
Farlex Dictionary of Idioms. © 2024 Farlex, Inc, all rights reserved.
mend one's ways
Improve one's behavior, as in Threatened with suspension, Jerry promised to mend his ways. This expression, transferring a repair of clothes to one of character, was first recorded in 1868, but 150 or so years earlier it had appeared as mend one's manners.
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.