Paul doesn't just describe what these people do, but who they are. What does it mean to be 'corrupted in mind' and 'disqualified regarding the faith'?
This verse pinpoints the root of resistance: a corrupted mind. It's not simply a lack of knowledge, but a mind that has been systematically twisted and deceived, often by their own sinful choices. When the mind is corrupted, the natural response is to reject God's truth. Paul then uses a strong term, 'disqualified' (Greek: adokimos), which can mean 'tested and found wanting,' like a flawed coin. Their minds are so compromised that they are rendered unfit or useless when it comes to matters of true faith. They've failed the test of genuine belief because their internal compass is broken.