2 Corinthians 11:12-15

12But what I am doing I will keep doing, [for I am determined to keep this independence] in order to cut off the claim of those who want an opportunity to be regarded just as we are in the things they brag about.

13For such men are counterfeit apostles, deceitful workers, masquerading as apostles of Christ.

14And no wonder, since Satan himself masquerades as an angel of light.

15So it is no great surprise if his servants also masquerade as servants of righteousness, but their end will correspond with their deeds.