2Pe 2:20 For if after they have escaped the pollutions of the world through the knowledge of the Lord and Saviour Jesus Christ, they are again entangled therein, and overcome, the latter end is worse with them than the beginning.
2Pe 2:21 For it had been better for them not to have known the way of righteousness, than, after they have known it, to turn from the holy commandment delivered unto them.
2Pe 2:22 But it is happened unto them according to the true proverb, The dog is turned to his own vomit again; and the sow that was washed to her wallowing in the mire.
A person can be saved and go back to enjoying sin and losing their soul.
They say faith alone but love is greater than faith, and faith works by love.
Love does not think an evil thought, and does not rejoice in iniquity, but rejoices in the truth to abstain from sin led by the Spirit.
So if they enjoy sin then that is not love then their faith is dead for love is greater than faith.
Faith means nothing unless there is love.
Heb 6:1 Therefore leaving the principles of the doctrine of Christ, let us go on unto perfection; not laying again the foundation of repentance from dead works, and of faith toward God,
Heb 6:2 Of the doctrine of baptisms, and of laying on of hands, and of resurrection of the dead, and of eternal judgment.
Heb 6:3 And this will we do, if God permit.
Heb 6:4 For it is impossible for those who were once enlightened, and have tasted of the heavenly gift, and were made partakers of the Holy Ghost,
Heb 6:5 And have tasted the good word of God, and the powers of the world to come,
Heb 6:6 If they shall fall away, to renew them again unto repentance; seeing they crucify to themselves the Son of God afresh, and put him to an open shame.
1Ti 4:1 Now the Spirit speaketh expressly, that in the latter times some shall depart from the faith, giving heed to seducing spirits, and doctrines of devils;
1Ti 4:2 Speaking lies in hypocrisy; having their conscience seared with a hot iron;
1Ti 4:3 Forbidding to marry, and commanding to abstain from meats, which God hath created to be received with thanksgiving of them which believe and know the truth.
1Ti 4:4 For every creature of God is good, and nothing to be refused, if it be received with thanksgiving:
1Ti 4:5 For it is sanctified by the word of God and prayer.
A person can be saved and lose salvation if they go back to the world believing in something else such as another religion, or being an atheist.
The Bible says some shall depart from the faith and follow this religion which is the new age movement who follow Lucifer, which if they do that they cannot come back and be saved again.
If a person leaves the truth of the Bible for an alternate reality they cannot be saved again for God will not allow it.
So a person can be in the faith and leave the truth that Jesus is Lord and Savior for an alternate reality in which they cannot be saved again if they change their mind.
All this faith alone, and they can never fall is causing a lot of hypocrisy, and is not correct.
It is love alone, and faith works by love, and love does not sin led by the Spirit,
The Bible says if a person is saved and does not continue in the goodness of God they shall be cut off.
And Jesus said if a person puts their hand to the plow and looks back they are not fit for the kingdom of God, which remember Lot's wife.
There are millions of people that say faith alone and then they are living in sin as they are at the worldly movie theaters, and they go to the bar, and they drink, and smoke, and possibly drugs, and watching programs on television that is not God approved, and listening to worldly music, and loving money, and material things, and think they are alright.
But God said love not the world, neither the things that are in the world.