That is a bold face lie. You are not saved without faith in the Lord Jesus Christ...plain and simple.
We are saved the moment that we believe on the Lord Jesus Christ. Yet though, our Salvation is not affected if we stop believing. Salvation is a one time event, it is not a process. Hence, while a Christian should keep the faith and continue to believe, there is no guarantee that he will keep the faith, though. Therefore must a Christian Keep believing in order to stay saved??? No. A Christian Should keep believing, but not to stay saved, but rather to earn rewards at the Judgment Seat of Christ.
If you are saved you won't turn into an atheist and still be saved. That is a foolish lie, right from the pits of Hell.
If a Christian walks after the flesh long enough, he is surely capable of departing from the faith.
Sounds like something the snake in the garden would have said.
What do you all think happens when you get saved? God don't just leave us to our own devices!
If you don't have the Spirit through faith in Jesus Christ then you are none of His....Plain and Simple.
God gives us the choice, whether we will walk in the Spirit or in the Flesh. It is a daily choice that we must make.