2 Corinthians 11:12-15

And I will continue doing what I am doing now, because I want to stop those people from having a reason to brag. They would like to say that the work they brag about is the same as ours. Such men are not true apostles but are workers who lie. They change themselves to look like apostles of Christ. This does not surprise us. Even Satan changes himself to look like an angel of light. So it does not surprise us if Satan’s servants also make themselves look like servants who work for what is right. But in the end they will be punished for what they do.