Answer:
This is said by Proctor. He says this to illustrate that nothing in Salem has changed except that now the courts are believing the false accusations of people who want to get rid of other people, out of resentment or revenge. The accusers always end up being right.
In this case, Abigail wants to get rid of Elizabeth because she fired her, also taking Proctor away. Vengeance is writing the law in Salem.
