People who live in glass houses shouldn't throw stones

Cultural  

1. We shouldn't complain about others if we are as bad as they are.

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people who live in glass houses shouldn't throw stones Idioms  

1. One who is open to criticism should not criticize others, as in It's stupid of Mike to mention his opponent's accepting donations from lobbyists—people who live in glass houses! This proverb is so well known that it is often shortened. [Late 1300s] Also see pot calling the kettle black.

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Example Sentences

St. Martin's Press is determined to show the veracity of the old chestnut about why people who live in glass houses shouldn't throw stones.

From Time Magazine Archive

Really, Aunt Helen, people who live in glass houses shouldn't throw stones.

From The Lieutenant-Governor A Novel by Carryl, Guy Wetmore