“People who live in glass houses should not throw stones.”

What does it mean?

A phrase one can say meaning people should not criticize others for faults that they have themselves.

Where does it come from?

It originated during the early Middle Ages. The Middle Ages were a tumultuous, yet fascinating period of history: Robert the Bruce, the Black Death, and Canterbury Tales.

According to some online sources, the phrase was first noted in Geoffrey Chaucer’s ‘Troilus and Criseyde’ in 1385. But, it is thought that Chaucer took it from the bible. John 8:7 says, “Let him without sin, be the first to throw a stone.”