In Christianity a "Saved" person can become not "Saved"

I'll begin this round by clarifying: I do not believe there is contradiction in the Bible, and that I merely pointed out, that without proper context, such passages can appear to be in contradiction; from that bad doctrine will follow.My opponent begins, by stating a scripture should say something other than it does. I need not say it, but this is a no-no. Furthermore, to say "believes" already encompasses the idea of continued belief. It would be redundant for something like this to be said, because, as I will demonstrate, salvific belief (faith) is either present or absent; not wavering. The passage from Ephesians and Romans is more than clear, and given the omniscient description of God in these passages and the many others like it, we can very easily say, if someone is not saved in the end, they were never saved to begin with. My opponent completely ignores the passages and their clear effort to help those in grace to understand: God is the judge, and he chose to save you; In spite of you. We never would have chosen God (according to the scriptures), God had to place faith in us, AND had to sacrifice his son, so that we would be saved. *As PRO has already agreed we all fall short of the glory of God, and we cannot uphold the LAW; not even to the slightest most insignificant way possible. Since it's been established, all who fall short of the law will perish, we know there is only one option; and this is Faith in Christ.Romans 12:33 For by the grace given me I say to every one of you: Do not think of yourself more highly than you ought, but rather think of yourself with sober judgment, in accordance with the faith God has distributed to each of you.Faith has been given to us, because we never would have found it otherwise. If we couldn't have found it in ourselves, then we know without God's complete intervention, we would not keep it! John 10:25-3025 Jesus answered, “I did tell you, but you do not believe. The works I do in my Father’s name testify about me, 26 but you do not believe because you are not my sheep.(1) 27 My sheep listen to my voice; I know them, and they follow me. 28 I give them eternal life, and they shall never perish; no one will snatch them out of my hand. 29 My Father, who has given them to me, is greater than all; no one can snatch them out of my Father’s hand.30 I and the Father are one.” (1) This is another clear passage to address those who do not endure until the end. These "pretenders" never understood the gospel, and thus, were never even sheep! He goes on to explain why he knows this- because no one can remove or be removed from his hand. He gives them eternal life, and they follow him; they do not turn into Sheppard’s or act as Sheppard’s, they follow the Sheppard.More to the point continued below...Romans 8:36-3936 As it is written: “For your sake we face death all day long; we are considered as sheep to be slaughtered.” 37 No, in all these things we are more than conquerors through him who loved us. 38 For I am convinced that neither death nor life, neither angels nor demons, neither the present nor the future, nor any powers, 39 neither height nor depth, nor anything else in all creation, will be able to separate us from the love of God that is in Christ Jesus our Lord. Nothing in all creation can separate the elect from the love of God, and his promise to redeem those chosen IN Christ. Now, I have heard quite often that we can remove ourselves; this is a ridiculous statement, as we can see above^. 1. Nothing in creation can remove us2. We are created3. Therefore we cannot remove ourselvesAnother passage my opponent simply hand waived, was the passage from 1 John 2:18-19:1 John 2:18-1918 Dear children, this is the last hour; and as you have heard that the antichrist is coming, even now many antichrists have come. This is how we know it is the last hour.19 They went out from us, but they did not really belong to us. For if they had belonged to us, they would have remained with us; but their going showed that none of them belonged to us. This again, demonstrates to us, that if any one were to commit apostasy, or become swayed elsewhere - they were never saved to start. We never had the choice or option to accept Christ; God did. He placed our faith in us, and those who've not been saved, were never meant to be.As I posted, also in the last round: 14 What then shall we say? Is God unjust? Not at all! 15 For he says to Moses, “I will have mercy on whom I have mercy,and I will have compassion on whom I have compassion.” Outside of God's purpose, there is no reason we were saved, and there is nothing we could do to remove ourselves. 1 Corinthians 7:2222 For the one who was a slave when called to faith in the Lord is the Lord’s freed person; similarly, the one who was free when called is Christ’s slave. Slaves cannot chose to be free once they've been bought and paid for, as we were paid for, by Christ’s blood. Sinners because we Sin, or Sin because we're Sinners?My opponent then continues to contradict himself, by asserting we must do something(works of ourselves) in order to maintain our salvation, after stating that we all fall short of the LAW! As I expressed very adamantly in the 2nd round: When you have no understanding of LAW and Gospel, you will undoubtedly make these sorts of errors. You are either under the Law, or elected to the Gospel; there is no middle ground. The Law = perfectionwith the passage from Romans 8, my opponent again makes the mistake of diluting the Law, into something I like to call: Law-lite. He describes a struggle we must adhere too, and while I agree very strongly that there is a struggle, I do not see any solid reason, for my opponent to imply that this struggle is to determine your salvation. The passages are divided into Justification vs. Sanctification.Justification - Our status of salvation; ChristSanctification - Our growth in Christ and knowledge of Godit is insulting to insinuate Paul believed in works. Paul actually shows a hint of distain when speaking of those who seek justification by works; by the law. The law was meant for Christ to uphold, and for us to recognize sin and our depravity (Romans 7).14 We know that the law is spiritual; but I am unspiritual, sold as a slave to sin. 15 I do not understand what I do. For what I want to do I do not do, but what I hate I do. 16 And if I do what I do not want to do, I agree that the law is good. 17 As it is, it is no longer I myself who do it, but it is sin living in me. 18 For I know that good itself does not dwell in me, that is, in my sinful nature. For I have the desire to do what is good, but I cannot carry it out. 19 For I do not do the good I want to do, but the evil I do not want to do—this I keep on doing. 20 Now if I do what I do not want to do, it is no longer I who do it, but it is sin living in me that does it. 21 So I find this law at work: Although I want to do good, evil is right there with me. 22 For in my inner being I delight in God’s law; 23 but I see another law at work in me, waging war against the law of my mind and making me a prisoner of the law of sin at work within me. 24 What a wretched man I am! Who will rescue me from this body that is subject to death? 25 Thanks be to God, who delivers me through Jesus Christ our Lord! So then, I myself in my mind am a slave to God’s law, but in my sinful nature a slave to the law of sin So as you can see. We were never meant to stop sinning in this life, because we are infected to deeply by sin; the heart is beyond cure(Jer. 7:9). The only way for us to recieve salvation is through Christ, and his works. Salvation is a Gift from God, to whom ever he chooses. Once a person has been chosen, they are chosen before all time, until the end of time, and there is nothing one of them could do to remove themselves from Gods favor.Blasphemy against the spirit, is denying Christ's work was for the complete remission of all sins. Those who adhere to this belief, are those who never belonged.