In the first place every one in the Christian world is not believers, just as every one that is in the world is not of the world.
One side will say if you drink coffee or smoke you are not saved.
The exact opposite are the people who will glory in the real sins of the world an still proclaim they are saved.
They know who they are, i don,t, and they just love religion of any kind, what ever it is that fits their needs or wants or their self righteous fancy or tradition.
That is why Jesus said the kingdom of God is within you.
You can not see the kingdom of God in a good will program which is advertized for that purpose, you can only see the real thing when people are being who they really are.
The man woman or child you gave food to may be the only one that know who you really are.
Mathew 25
40 “The King will reply, ‘Truly I tell you, whatever you did for one of the least of these brothers and sisters of mine, you did for me.’
James 2
18 Yea, a man may say, Thou hast faith, and I have works: shew me thy faith without thy works, and I will shew thee my faith by my works.
James is talking about the same works as Jesus was talking about.
Exactly what is the comparison of the works that Jesus was talking about, and the absolutely required "works" that demand participation in arcane rituals in mormon temples in order to reach salvation?