God knows our hearts. We love Him, don't we. Sin will not keep us from Him. Jesus paid it all. God will accomplish in us what He had set out from the very beginning to accomplish.
Eph 1:3-9
Blessed be the God and Father of our Lord Jesus Christ, who has blessed us with every spiritual blessing in the heavenly places in Christ, just as He chose us in Him before the foundation of the world, that we would be holy and blameless before Him. In love He predestined us to adoption as sons through Jesus Christ to Himself, according to the kind intention of His will, to the praise of the glory of His grace, which He freely bestowed on us in the Beloved. In Him we have redemption through His blood, the forgiveness of our trespasses, according to the riches of His grace 8 which He lavished on us. In all wisdom and insight NASU
Gal 3:10-14
"For as many as are of the works of the Law are under a curse; for it is written, "CURSED IS EVERYONE WHO DOES NOT ABIDE BY ALL THINGS WRITTEN IN THE BOOK OF THE LAW, TO PERFORM THEM." Now that no one is justified by the Law before God is evident; for, "THE RIGHTEOUS MAN SHALL LIVE BY FAITH." However, the Law is not of faith; on the contrary, "HE WHO PRACTICES THEM SHALL LIVE BY THEM." Christ redeemed us from the curse of the Law, having become a curse for us — for it is written, "CURSED IS EVERYONE WHO HANGS ON A TREE" — in order that in Christ Jesus the blessing of Abraham might come to the Gentiles, so that we would receive the promise of the Spirit through faith."
Rom 5:12-14
"Therefore, just as through one man sin entered into the world, and death through sin, and so death spread to all men, because all sinned — for until the Law sin was in the world, but sin is not imputed when there is no law. Nevertheless death reigned from Adam until Moses, even over those who had not sinned in the likeness of the offense of Adam, who is a type of Him who was to come." NASU
The sin of Adam was imputed to all his ofspring. And just as Adam's sin was imputed to all mankind, so Jesus not sinning, but being righteous, Jesus righteousness has likewise been imputed to all mankind whom accept the atoning BLOOD OF JESUS shed on the cross, taking upon Himself the punishment we deserve, that death should no longer befall us because of Adam. Whereas the sin of Adam seperated us from God, the righeousnous of Jesus has given us reconciliation with God.
With regard to the Mosaic Law, Jesus kept all of the Mosaic Law on our behalf, he died in our place, bearing the penalty of sins, on our behalf, that we may live, and receive the life abundant.
Rom 8:1-11
Therefore there is now no condemnation for those who are in Christ Jesus. For the law of the Spirit of life in Christ Jesus has set you free from the law of sin and of death. For what the Law could not do, weak as it was through the flesh, God did: sending His own Son in the likeness of sinful flesh and as an offering for sin, He condemned sin in the flesh, so that the requirement of the Law might be fulfilled in us, who do not walk according to the flesh but according to the Spirit.
and, - Rom 10:10-13 NASU
"with the heart a person believes, resulting in righteousness, and with the mouth he confesses, resulting in salvation. For the Scripture says, "WHOEVER BELIEVES IN HIM WILL NOT BE DISAPPOINTED." For there is no distinction between Jew and Greek; for the same Lord is Lord of all, abounding in riches for all who call on Him; for "WHOEVER WILL CALL ON THE NAME OF THE LORD WILL BE SAVED."
We are saved by our acceptance of the Blood of Jesus, the perfect Paschal Lamb WHOM took our place on the cross, and WHOSE blood washes away all our sins for all time - past, present, and future, to all whom accept the Atoning Blood of the only Perfect Pashcal Lamb - Jesus the Messiah, the only God Born of the Father, in the flesh, whom took upon HIMSELF the punishment of our sins, in our place, that we whosoever accept the atoning blood of Jesus shall receive eternal life, the life of abundant.
But what about -
Phil 2:12 & 13 "Continue to work out your salvation with fear and trembling for it is God who works in you to will and to act according to his good purpose".
Some have used these verses to conclude that real Christians can lose their salvation, but it clearly does not say that, such is an extrapolation that is false.
Now let's take a look at Phil 2 v 12 & 13 in its’ entirety: "So then, my beloved, just as you have always obeyed, not as in my presence only, but now much more in my absence, continue to work out your salvation with fear and trembling, for it is God who works in you to will and to act according to his good purpose".
This is the verse I’m always given by those who claim that any Christian can lose their salvation if they are not careful, and they often quote it by starting with “work out” and stop at “trembling”. The phrase “fear and trembling” in the Greek is a poetic expression, phobou kai tromou, that Paul uses elsewhere to highlight the inner attitude one should have toward their master. We know from what is written before this in Philippians prior to these two versus that Paul is NOT telling them to be fearful, for Paul has emphasized that he wants their love for each other to abound.
When we read Philippians 2: 12-13, we should keep in mind that Paul wrote in his opening comments Phil 1:6 of his confidence "that He who began a good work in you will carry it on to completion until the day of Christ Jesus." This is a factual Theological Statement. It is factual because anything that God is doing will get done, no ifs, ands, or buts. Now, it must be so that whatever Paul writes after this, it can not be in contradiction to this statement. If God had begun this good work in any of them and then even one of them lost their salvation, God will have failed to have carried this good work through to completion. That is impossible.
Paul goes on to mention in Chapter 3 that there are those who God has not saved, and some of these have joined themselves to the Christian Church, but they are not saved for they are enemies of Christ. They did not lose their salvation, they never had it.
In Chapter 4 Paul tells the Christians in Philippi that they have peace with God, fellowship with God, and to open themselves to further transformation by God by dwelling on “whatever is true, whatever is honorable, whatever is right, whatever is pure, whatever is lovely, whatever is of good repute, if there is any excellence and if anything worthy of praise.” Then Paul praises their generosity and again tells them that God is working for them: “And my God will supply all your needs according to His riches in glory in Christ Jesus. Now to our God and Father be the glory forever and ever.”
So what could Paul possible mean by "So then, my beloved, just as you have always obeyed, not as in my presence only, but now much more in my absence, continue to work out your salvation with fear and trembling for it is God who works in you to will and to act according to his good purpose"?
Taking the letter as a whole, Paul is praising the Philippians and assuring them of their salvation, , of whom he is confident and wants them to be also, having pointed out that that God, who is working in them, will carry His work in them through to completion. They have always obeyed, even in Paul’s absence. Paul makes it very clear that both he and God are very pleased with them. Paul can’t possible be saying that despite all this good stuff he wrote about them, that they better work out their salvation for they are in danger of still losing it. Such a conclusion would be an absurdity.
The Greek word "katergazomai" which has been translated “work out” but has several possible meanings: To Finish off, To Work, To Effect, To Achieve. Which one should be used? The ‘work’ God is doing is the Greek word ‘energeo’ meaning active and efficient work. This is where our modern word energy comes from.
It is my view that put into the context of the text, God is performing an active and efficient work in us that guarantees our salvation, and that Paul in Phil 2: 12-13 is exhorting us to put into effect the changes God is making in us, into use and practice (i.e. actualization). There is nothing here about any possibility of any real Christian losing their salvation.