We can be assured of our salvation by faith in Jesus to the end.
The power of God to be be saved is by faith in Lord Jesus; so we access God's saving grace through faith - from beginning to end:
Romans 1:16-17 (WEB) 16 For I am not ashamed of the Good News of Christ, because it is the power of God for salvation for everyone who believes, for the Jew first, and also for the Greek. 17 For in it is revealed God’s righteousness from faith to faith. As it is written, “But the righteous shall live by faith.” [Habakkuk 2:4]
Romans 5:1-2 (WEB)
5 Being therefore justified by faith, we have peace with God through our Lord Jesus Christ; 2 through whom we also have our access by faith into this grace in which we stand. We rejoice in hope of the glory of God.
John 5:24 (WEB) 24 “Most certainly I tell you, he who hears my word and believes him who sent me has eternal life, and doesn’t come into judgment, but has passed out of death into life.
John 8:12 (WEB) 12 Again, therefore, Jesus spoke to them, saying, “I am the light of the world. [Isaiah 60:1] He who follows me will not walk in the darkness, but will have the light of life.”
John 12:46 (WEB) 46 I have come as a light into the world, that whoever believes in me may not remain in the darkness.
John 20:31 (WEB) 31 but these are written, that you may believe that Jesus is the Christ, the Son of God, and that believing you may have life in his name.
If you remain faithful to the end, you will be eternally saved.
Revelation 3:21 (WEB) He who overcomes, I will give to him to sit down with me on my throne, as I also overcame, and sat down with my Father on his throne.
2 Thessalonians 1:4-11 (WEB)
4 So that we ourselves boast about you in the assemblies of God for your perseverance and faith in all your persecutions and in the afflictions which you endure. 5 This is an obvious sign of the righteous judgment of God, to the end that you may be counted worthy of God’s Kingdom, for which you also suffer.
Revelation 3:1-6 (WEB)
1 “I know your works, that you have a reputation of being alive, but you are dead. 2 Wake up and keep the things that remain, which you were about to throw away, for I have found no works of yours perfected before my God. 3 Remember therefore how you have received and heard. Keep it and repent. If therefore you won’t watch, I will come as a thief, and you won’t know what hour I will come upon you.
4 Nevertheless you have a few names in Sardis that didn’t defile their garments. They will walk with me in white, for they are worthy.
5 He who overcomes will be arrayed in white garments, and I will in no way blot his name out of the book of life, and I will confess his name before my Father, and before his angels.
Luke 21:36 (WEB) 36 Therefore be watchful all the time, praying that you may be counted worthy to escape all these things that will happen, and to stand before the Son of Man.”
Romans 11:19-22 (WEB) 19 You will say then, “Branches were broken off, that I might be grafted in.” 20 True; by their unbelief they were broken off, and you stand by your faith. Do not be conceited, but fear; 21 for if God didn’t spare the natural branches, neither will he spare you. 22 See then the goodness and severity of God. Toward those who fell, severity; but toward you, goodness, if you continue in his goodness; otherwise you also will be cut off.
1 Corinthians 15:1-2 (WEB) Now I declare to you, brothers, the Good News which I preached to you, which also you received, in which you also stand, 2 by which also you are saved, if you hold firmly the word which I preached to you — unless you believed in vain.
1 Corinthians 9:23-27 (WEB) 23 Now I do this for the sake of the Good News, that I may be a joint partaker of it. 24 Do not you know that those who run in a race all run, but one receives the prize? Run like that, that you may win. 25 Every man who strives in the games exercises self-control in all things. Now they do it to receive a corruptible crown, but we an incorruptible. 26 I therefore run like that, not aimlessly. I fight like that, not beating the air, 27 but I beat my body and bring it into submission, lest by any means, after I have preached to others, I myself should be rejected.
Galatians 6:8-9 (WEB) 8 For he who sows to his own flesh will from the flesh reap corruption. But he who sows to the Spirit will from the Spirit reap eternal life. 9 Let us not be weary in doing good, for we will reap in due season, if we do not give up.
James 1:12-16 (WEB)
12 Blessed is a person who endures temptation, for when he has been approved, he will receive the crown of life, which the Lord promised to those who love him.
1 Timothy 4:16 (WEB) Pay attention to yourself and to your teaching. Continue in these things, for in doing this you will save both yourself and those who hear you.
Colossians 1:21-23 (WEB) 21 You, being in past times alienated and enemies in your mind in your evil deeds, 22 yet now he has reconciled in the body of his flesh through death, to present you holy and without defect and blameless before him, 23 if it is so that you continue in the faith, grounded and steadfast, and not moved away from the hope of the Good News which you heard, which is being proclaimed in all creation under heaven, of which I, Paul, was made a servant.
1 Timothy 4:1-2 (WEB) 1 But the Spirit says expressly that in later times some will fall away from The Faith, paying attention to seducing spirits and doctrines of demons, 2 through the hypocrisy of men who speak lies, branded in their own conscience as with a hot iron.
1 Timothy 6:20-21 (WEB) 20 Timothy, guard that which is committed to you, turning away from the empty chatter and oppositions of what is falsely called knowledge, 21 which some profess, and thus have wandered from The Faith.
Hebrews 3:6 (WEB) 6 but Christ is faithful as a Son over his house. We are his house, if we hold fast our confidence and the glorying of our hope firm to the end.
Hebrews 3:12-15 (WEB) 12 Beware, brothers and sisters, lest perhaps there might be in any one of you an evil heart of unbelief, in falling away from the living God; 13 but exhort one another day by day, so long as it is called “today”, lest anyone of you be hardened by the deceitfulness of sin. 14 For we have become partakers of Christ, if we hold the beginning of our confidence firm to the end, 15 while it is said,
“Today if you will hear his voice,
do not harden your hearts, as in the rebellion.” [Psalm 95:7-8]
Hebrews 10:24-30 (WEB)
24 Let us consider how to provoke one another to love and good works, 25 not forsaking our own assembling together, as the custom of some is, but exhorting one another, and so much the more as you see the Day approaching.
26 For if we sin willfully after we have received the knowledge of the truth, there remains no more a sacrifice for sins, 27 but a certain fearful expectation of judgment, and a fierceness of fire which will devour the adversaries.
28 A man who disregards Moses’ law dies without compassion on the word of two or three witnesses. 29 How much worse punishment do you think he will be judged worthy of who has trodden under foot the Son of God, and has counted the blood of the covenant with which he was sanctified an unholy thing, and has insulted the Spirit of grace?
30 For we know him who said, “Vengeance belongs to me. I will repay,” says the Lord. [Deuteronomy 32:35] Again, “The Lord will judge his people.” [Deuteronomy 32:36; Psalm 135:14 31] It is a fearful thing to fall into the hands of the living God.
Hebrews 10:36-39 (WEB)
36 For you need endurance so that, having done the will of God, you may receive the promise.
37 “In a very little while, he who comes will come, and will not wait.
38 But the righteous will live by faith. If he shrinks back, my soul has no pleasure in him.” [Habakkuk 2:3-4]
2 Peter 3:17 (WEB) 17 You therefore, beloved, knowing these things beforehand, beware, lest being carried away with the error of the wicked, you fall from your own steadfastness.
Blessings