Many Christians are like this, on the outside people see them as christians because they Go to Church and seem to be religious but inside of them they are still very worldly!!!
This is because their minds have not yet been renewed, re-programmed by the Spirit of the word, the old- nature’s software has not been Uninstalled from their system and as such they still talk like the world, think like normal mere men, always feel helpless, do the same things as the world, live below expectation and have little progress and difference in their lives.
They may even have head knowledge of the letter(Cram Scriptures), but Zero of the Spirit. And Only the Spirit of the word brings transformation and this transformation is done in the mind!!!