The Bible is very clear that a person is saved by the Grace of God alone through faith alone in Christ alone- The Bible says in Ephesians 2:8-10 LITV For by grace you are saved, through faith, and this not of yourselves; it is the gift of God; not of works, that not anyone should boast; for we are His workmanship, created in Christ Jesus unto good works, which God before prepared that we should walk in them, nothing we do, not by our works of righteousness, for the Bible says our works of righteousness are like a menstruous cloth in the sight of the Holy God, for the Bible says in Isaiah 64:6 LITV But we are all as the unclean thing , and all our righteousnesses are as a menstruous cloth. And we all fade as a leaf, and like the wind our iniquities take us away. A believer is saved by the perfect Work of Christ, by His death, burial and resurrection - The Bible says in 1Corinthians 15:1-4 LITV But, brothers, I reveal to you the gospel which I preached to you, which you also received, in which you also stand, by which you also are being kept safe, if you hold fast the word which I preached to you, unless you believed in vain. For I delivered to you in the first place what I also received, that Christ died for our sins, according to the Scriptures, and that He was buried, and that He was raised the third day, according to the Scriptures, - When a person come to Christ, he/she receives Christ's perfect righteousness, which is imputed to their account, which is shown in Romans 3:22 LITV even the righteousness of God through faith of Jesus Christ toward all and upon all those believing; for there is no difference, - A believer is declared righteous by God in the righteousness of Christ. The Bible says in Romans 4:8 LITV Blessed are those whose lawlessnesses are forgiven, and whose sins are covered; blessed the man to whom the Lord will in no way charge sin." Christ has paid the sin debt fully for every believer in Him.
The Bible also teaches that nobody would ever come to the Lord Jesus Christ unless born from above (which means a spiritual birth). The Bible says in John 3:3 LITV Jesus answered and said to him, Truly, truly, I say to you, if one does not receive birth from above, he is not able to see the kingdom of God. The Bible tells us in the same chapter, this is a work of the Holy Spirit- John 3:5-7 LITV Jesus answered, Truly, truly, I say to you, if one does not receive birth out of water and Spirit, he is not able to enter into the kingdom of God. That receiving birth from the flesh is flesh, and that receiving birth from the Spirit is spirit. Do not wonder because I told you, You must receive birth from above. If the Holy Spirit does not work in this way in an individual, a person will continue to hate God- continue to reject Christ- for the Bible says in Jeremiah 17:9 LITV The heart is deceitful above all things, and it is incurable; who can know it? The Bible says in Romans 3:11 LITV There is none that understands, there is "not one that seeks after God.
So, the Bible teaches a sinner is saved by Grace alone, through faith alone, in Christ alone, and not by any works we do, but the Bible also says that a person who has true saving faith, will produce good fruit- good fruit will come forth. The Bible says in Philippians 1:6 LITV being persuaded of this very thing, that the One having begun a good work in you will finish it until the day of Jesus Christ.
The Bible says in 1John 3:9-10 LITV Everyone who has been begotten of God does not sin, because His seed abides in him, and he is not able to sin, because he has been born of God. When the Bible says, 'does not sin' and 'not able to sin', it means one who is born again does not habitually practice sin, and he/she is not able to habitually practice sin like they did before salvation- it does not mean sinless perfection, for the Bible says in 1John 1:8 LITV If we say that we have no sin, we deceive ourselves, and the truth is not in us, but speaks of practice, which is seen in verse 10, By this the children of God and the children of the Devil are revealed: Everyone not practicing righteousness is not of God; also the one not loving his brother. A person who is habitually practicing sin is not saved- they have never known the Lord Jesus Christ- never been saved. The Bible says that Christians are a new creation- 2Corinthians 5:17 LITV So that if anyone is in Christ, that one is a new creation; the old things have passed away; behold, all things have become new!
Obviously, when a person comes to Christ, they are a babe in Christ, and they need to mature in the faith- even matured Christians will continue to be sanctified through their Christian life, which will be completed at glorification- the Bible says in 1John 3:2 LITV Beloved, now we are the children of God, and it was not yet revealed what we shall be. But we know that if He is revealed, we shall be like Him, because we shall see Him as He is, but God continues to work in the lives of His people in Christ, like we have already seen in Philippians 1:6, through His Word 2Timothy 3:16-17 LITV Every Scripture is God-breathed and profitable for doctrine, for reproof, for correction, for instruction in righteousness, so that the man of God may be perfected, fully furnished for every good work, by the power of the Holy Spirit John 14:26 LITV but the Comforter, the Holy Spirit, whom the Father will send in My name, He shall teach you all things and shall remind you of all things that I said to you.
To conclude, a saved person does not look to their works for salvation, but to whom they have their faith in for salvation, the Lord Jesus Christ, but when a person comes to repentance and faith in the Lord Jesus Christ, and trust in Him alone to save them by His death, burial and resurrection, the good fruit will naturally come, not to get saved, but because they are saved, and be evident of a regenerate person in Christ, who has a true saving faith in God, who is now a spiritual man (having the Spirit), and not a natural man (without the Spirit of God).