The only true church. Salvation by works. The work of Christ on the cross has little place in the Church's teaching. Even references to forgiveness of sins for salvation have been removed from their hymn book. The way is to follow the example of Christ, the perfect preacher.
Higher education is frowned upon.
Books, including theological works, are not to be studied. When the group was founded in the 1890's, the mainline denominations were seen as sectarian and snobbish. Their initial protest against organized religion has been institutionalized in their teachings. Poor preachers, rather then paid ministers. Yet in practice the church is extremely authoritarian.