Can a christian loose salvation do to openly sinning against God?

Answer 1

No. All sin is against God and is openly against God no matter how "big" or "small". 1 Sam 12:23. And Christ himself openly say in the Gospels that once a person has believed in Christ and accepted Christ as their savior by believing in the finished and final work of Jesus Christ on the cross for all of the world (Romans 3:23, Romans 6:23a, 2 Peter 3:9, John 3:!6, Romans 5:8, 1 Cor. 15:3-4, Ephesians 2:1-10), CANNOT lose their salvation no matter what they do on this earth because of what it states in The Bible:

Jeremiah 32:38-41 (Concerning the Promise of the New Covenant) "They will be my people, and I will be their God. I will give them singleness of heart and action, so that they will always fear me for their own good and the good of their children after them. I will make an everlasting covenant with them: I will never stop doing good to them, and I will inspire them to fear me, so that they will never turn away from me. I will rejoice in doing them good and will assuredly plant them in this land with all my heart and soul."

1John 2:19, 1John 3:6,9 (as explained above)

John 5:24 "I tell you the truth, whoever hears my word and believes him who sent me has eternal life and will not be condemned; he has crossed over from death to life."

John 6:37 "All that the Father gives me will come to me, and whoever comes to me I will never drive away." (Combine this with Jeremiah 32:40 above)

John 10:28 "I give them eternal life, and they shall never perish; no one can snatch them out of my hand."

Romans 6:8 "Now if we died with Christ, we believe that we will also live with him."

Romans 8:9-10 "You, however, are controlled not by the sinful nature but by the Spirit, if the Spirit of God lives in you. And if anyone does not have the Spirit of Christ, he does not belong to Christ. But if Christ is in you, your body is dead because of sin, yet your spirit is alive because of righteousness." Notice the Calvinistic idea of the Perserverence of the Saints. If you belong to Christ, then the Spirit lives in you. And if the Spirit lives in you, the your general outlook and your lifestyle is not controlled by yourself (loss of free-will), but is controlled by the Holy Spirit. In which case, as it says in Rom 8:1 "Therefore, there is now no condemnation for those who are in Christ Jesus." or if you prefer the King James "There is therefore now no condemnation to them which are in Christ Jesus, who walk not after the flesh, but after the Spirit." (such a condition is automatically satisfied for those who belong to Christ as Rom 8:9,10 mention).

Romans 8:28-30 "And we know that in all things God works for the good of those who love him, who have been called according to his purpose. For those God foreknew he also predestined to be conformed to the likeness of his Son, that he might be the firstborn among many brothers. And those he predestined, he also called; those he called, he also justified; those he justified, he also glorified."

1Cor 1:8,9 "He will keep you strong to the end, so that you will be blameless on the day of our Lord Jesus Christ. 9 God, who has called you into fellowship with his Son Jesus Christ our Lord, is faithful."

1Cor 3:15 "If it is burned up, he will suffer loss; he himself will be saved, but only as one escaping through the flames." 1Cor 3:11-15 is the judgment that true believers face. Though all such people have eternal life, yet some will be rewarded more than others based on their performance. This is not a contradiction of John 5:24 which says that such people have already passed through the judgment, as the "judgment" it is referring to in that verse is the Great White Throne judgment in which unbelievers will be cast into hell. In the judgment here, it is not the person, but his works which will be burned up.

2Cor 1:21,22 "Now it is God who makes both us and you stand firm in Christ. He anointed us, set his seal of ownership on us, and put his Spirit in our hearts as a deposit, guaranteeing what is to come."

Ephesians 1:5 "he predestined us to be adopted as his sons through Jesus Christ, in accordance with his pleasure and will--"

Ephesians 1:11 "In him we were also chosen, having been predestined according to the plan of him who works out everything in conformity with the purpose of his will,"

Eph 1:13,14 "And you also were included in Christ when you heard the word of truth, the gospel of your salvation. Having believed, you were marked in him with a seal, the promised Holy Spirit, who is a deposit guaranteeing our inheritance until the redemption of those who are God's possession-- to the praise of his glory."

Hebrews 7:25 "Therefore he is able to save completely those who come to God through him, because he always lives to intercede for them."

1Pet 1:3-5 "Praise be to the God and Father of our Lord Jesus Christ! In his great mercy he has given us new birth into a living hope through the resurrection of Jesus Christ from the dead, and into an inheritance that can never perish, spoil or fade-- kept in heaven for you, who through faith are shielded by God's power until the coming of the salvation that is ready to be revealed in the last time." (xref Eph 1:14)

1John 5:4 "for everyone born of God overcomes the world. This is the victory that has overcome the world, even our faith."