The need for transformation starts in the manner in which one thinks, reasons, reflects. It begins in the mind. One becomes convinced of the Truth of the Holy Catholic Church and converts.
People in ministries spend too much time addressing the heart. Only the Holy Spirit can change a heart. But, we can change minds, our own and others.
Christ addresses this, and so does St. Paul, and only those who are faithful members of the Catholic Church do what Paul states.