Explaining “It takes one to know one”

What does it mean?

The phrase "It takes one to know one" is used to imply that someone who exhibits certain characteristics or behaviors is recognizing those same traits in someone else. It suggests that the person making a judgment or accusation is familiar with the trait because they themselves possess it.

Tone

Origin

The exact origin of the phrase is unclear, but it has been used in English-speaking cultures for many years, possibly dating back to the early 20th century, as a retort in verbal exchanges.