What is the purpose of Jesus Christ dying on the cross when after believing in Him one can not be saved because of sin. This is the question of one of my friend citing John 3:16 For God so loved the world that He gave His only begotten Son, that whoever believes in Him should not perish but have everlasting life and Romans 8:38 For I am persuaded, that neither death, nor life, nor angels, nor principalities, nor powers, nor things present, nor things to come, Nor height, nor depth, nor any other creature, shall be able to separate us from the love of God, which is in Christ Jesus our Lord.
I call this belief elementary or just the basic because salvation is not just believing and presto, you're saved.
2 Peter 2:20-21 For if, after they have escaped the pollutions of the world through the knowledge of the Lord and Savior Jesus Christ, they are again entangled in them and overcome, the latter end is worse for them than the beginning. For it would have been better for them not to have known the way of righteousness, than having known it, to turn from the holy commandment delivered to them.
What was purchased by the blood of Christ is the sin from the pollutions of the World prior to the acceptance of Jesus as the Lord & Saviour like Mary Magdalene - the prostitute, whom Jesus had cast seven devils.
1 Timothy 1:13 although I was formerly a blasphemer, a persecutor, and an insolent man; but I obtained mercy because I did it ignorantly in unbelief.
What was forgiven was the sin done ignorantly not the original sin of Adam & Eve as some quarters insisted.
Ezekiel 18:20 The soul who sins shall die. The son shall not bear the guilt of the father, nor the father bear the guilt of the son. The righteousness of the righteous shall be upon himself, and the wickedness of the wicked shall be upon himself.
When one lived in righteousness, there and only then that we can connect John 3:16 & Romans 8:38 to justify salvation.
Romans 8:35-36 Who shall separate us from the love of Christ? Shall tribulation, or distress, or persecution, or famine, or nakedness, or peril, or sword? As it is written: “ For Your sake we are killed all day long; We are accounted as sheep for the slaughter.”
With the exception of Mary Magdalene, who become faithful follower of Christ, let it be known that there are possibilities of not saved while inside the Church like what happened to Judas Iscariot & the couple Ananias & Sapphira, Hymenaeus and Alexander, disproving the belief that once saved always saved.
Hebrews 6:4-6 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, And have tasted the good word of God, and the powers of the world to come, 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.
Can we judge those who are inside our Church?
1 Corinthians 5:1 It is actually reported that there is sexual immorality among you, and such sexual immorality as is not even named among the Gentiles—that a man has his father’s wife!1 Corinthians 5:11 But now I have written to you not to keep company with anyone named a brother, who is sexually immoral, or covetous, or an idolater, or a reviler, or a drunkard, or an extortioner—not even to eat with such a person.1 Corinthians 5:12-13 For what have I to do with judging those also who are outside? Do you not judge those who are inside? But those who are outside God judges. Therefore “put away from yourselves the evil person.”
The once saved always saved theory is not true after all.