Those who live in glass houses should not throw stones.

A person with obvious weaknesses, faults, or vulnerabilities should avoid attacking others for similar shortcomings. The figurative image presents a glass house as exposure to harm and stone-throwing as provoking criticism or retaliation.

The proverb stresses restraint rather than denying that another person has done wrong. It warns that hostile judgment is especially risky when one’s own position is fragile or open to scrutiny, because criticism may invite an equally damaging response.

Use it to caution someone against condemning, mocking, or accusing another person when the same charge could readily be made against them. It can be serious or a pointed rebuke in a dispute, and may sound accusatory when directed at a specific person because it highlights perceived hypocrisy or vulnerability.