15 To the pure, all things are pure, but to those who are corrupted and do not believe, nothing is pure. In fact, both their minds and consciences are corrupted. 16 They claim to know God, but by their actions they deny him. They are detestable, disobedient and unfit for doing anything good. Titus 1:15-16
Paul was still referencing the false prophets who wormed their way into the church. He had nothing good to say about them except to stay far from them. It’s the mindset of the world taken to an extreme because most of the world would never think about scamming church people. They draw a line somewhere. The false teachers don’t. In fact, they target the community of Believers. They use the same language so people will put down their guards. Their minds are corrupted. They’re dishonest and untrustworthy. But they sound real good. Some of them are still on television as televangelists.
Pastors and elders need wisdom and discernment protect their people from these false teachers. But they also need to keep in the Word of God so they can detect the insidious lies of he evil one.