The meaning of this is that people with problems shouldn't criticize others.
If you throw stones at glass houses, they break. In other words, make sure your own life is clean before condemning anyone else!
People in glass houses shouldn't throw stones.
The riverbed had gray, black, and white stones. We built the wall with stones. People who live in glass houses should not throw stones.
The meaning of this is that people with problems shouldn't criticize others.
In other words, it is not a good idea to criticise other people for having faults which you also have.
Those outside can see in and those inside can see out and they have one very important rule - People who live in glass houses should not throw stones
The meaning is: Don't do things to other people, which would be offensive to you if someone else has done it. I.E. if I live in glass house, and someone would throw a stone at me, then the glass would break and I would have to pay a lot of money to fix it, so I shouldn't to the same thing to others and throw stones at people's houses. (Even if the don't live in glass houses, there might be other reasons why it's bad) The main issue here is, I think, that nothing is certain and if something offensive to you, it may be also offensive to other people for totally different reasons. Yeah, but why would you live in a glass house? Or throw stones in your house? The moral isn't literally meaning about throwing stones in glass houses. it's more about doing something then telling someone else not to do it.
It's a good question, also it's good advice, unfortunatly no-one knows...
those people who are themselves suffering from shortcomings should not find flaws in others
People who live in glass houses, should not cast stones
Homines in domibus vitreis habitantes lapidos jacere non debent.
It means that if you were to live in a glass jar don't throw stones because you will break the glass.