Why did the Corinthian believers still struggle with immoral practices after conversion?
They were recently converted out of paganism and remained carnal, still carrying hang-ups with immoral practices they did not think were wrong. Their families and generations before them had practiced these things, so breaking from the past was hard for them.
Les explains that these believers were carnal, the opposite of mature spiritual Christians. They had recently been converted out of paganism, so they still had hang-ups with immoral practices they did not consider wrong, because their families and generations before them had done them; it was hard to break from the past. Yet despite their carnality, moral weaknesses, and problems, they were in grace, came behind in no gift, and awaited the coming of the Lord Jesus Christ.