Teacher : Andrew.

When Andrew brought this expression, there were different opinions about the origin of it.

He thought it is because other people can break your house easily but many of us thought it is because the stones thrown by the owner from the inside of the house will break his/her own house.

Then Andrew came out with some of the documents from the Internet supporting his opinion. But Jake still thinks thoss are not reliable.

Well, anyways, I am not sure which opinion is correct but basically this means do not ctiticize other people since you also have the same weaknesses.

This is one of my favorites since this is really true and people including me also forget about it and criticize other people without even thinking too much about consequences.

So, let’s not throw stones because everybody lives in a glass house!!!