it takes one to know one

English

Alternative forms

• takes one to know one

Proverb

it takes one to know one

1. (colloquial, childish) A retort to a negative accusation, implying that the accuser shares the fault.

   Bob: You're an idiot!

   Tony: Takes one to know one!

   • 1949, Nial Kent, The Divided Path, p. 358:

     There's an unkind saying that it takes one to know one, and it's almost true.

   • 1947, Poet Lore‎, p. 280:

     Anyone who appreciates Shakespeare as this author unquestionably does is another Shakespeare — it takes one to know one!

   • 1946, Gore Vidal, Williwaw‎, p. 45:

     “I’ve got a bad egg,” said Bervick. “I guess this was a pre-war egg.” […]

     “It takes one to know one,” said the Chief, referring back to the eggs.

See also

• I know you are but what am I
• look who's talking
• pot calling the kettle black

Translations

an insult which is true about both the sender and the receiver

• Danish: tyv tror, at hver mand stjæler ("A thief believes everybody steals")
• Italian: il bue che dice cornuto all'asino

• Russian: каждый судит по себе (každyj sudit po sebe)
• Spanish: piensa el ladrón que todos son de su condición