it takes one to know one
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used to suggest that in order to truly understand someone, one must possess similar qualities, experiences, or characteristics themselves
The proverb "it takes one to know one" does not come from a specific text or individual but reflects general wisdom found in many cultures. The saying highlights the idea that self-awareness and shared experiences enable a deeper understanding of others. It is often used in situations where someone accuses another of having certain characteristics, implying that the accuser shares those same traits.
- The detective was able to identify the criminal's behavior because he himself had once been a criminal, proving how it takes one to know one.