Définition et Signification de "it takes one to know one"

What is the origin of the proverb "it takes one to know one" and when to use it?

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.