text: why do so many think , any one who believes  in god is a christian. when  the devils also believe? they are not going to heaven read james 2:19 james is defending the truth of justification by faith against those who say that all you need to do is merely believe or say  you believe. his point is that you are not saved by a dead faith. a true living faith changes a person and you can see it in them. someone who says they have faith but has no fruit most likely has no faith at all.