OSAS = Once Saved Always Saved is true. When you are saved by belief in Jesus Christ with faith alone, then you are permanently saved and cannot lose your salvation. Jesus Christ was killed, buried and risen to pay for all our sins. You are born again, a new creation, permanently clean of all sins, permanently counted as righteous. The Holy Spirit, the Holy Ghost, who is God, is sealed on you and dwells in you permanently. You are Christ’s sheep, kept safe in His hands. Known as Eternal Security too. This is Assurance of Salvation.
Faith Alone in Christ -> Free Gift of Salvation -> Cannot Be Lost
Good Works -> Rewards of Discipleship -> Can Be Lost
You can lose the subjective feeling of joy that can come from salvation aka depressed, regret, guilt, discouraged, because of sin, but never the objective salvation itself!
A person may feel like they’re not saved, they may not have assurance of salvation, yet still be saved.
In the OT, the Holy Spirit would come and go from people. They were permanently saved by being Counted as Righteous by belief in the LORD. Now after NT, the Holy Spirit aka Holy Ghost permanently dwells inside of every believer when they have faith alone in Christ.
From fellow Christian Universalist Gary Amirault, founder of Tentmaker.org
However, on the subject of eternal security, his position was Calvinistic (once saved always saved).
I'm the kind of person who likes to have a sound and reasonable answer to all questions. For example, I might find myself one day in a Baptist church which may have handed me a brochure on the doctrine of eternal security, that is, that once a person was "saved" or "born again," they could not lose their salvation; the gift of eternal life could not be revoked nor lost even by turning away from God or denying Him. I would take the brochure to perhaps the Assembly of God pastor or some other denomination which taught one could lose their salvation. (This, by the way, is what the vast majority of Christians are incorrectly taught). I would wrestle back and forth with the various pastors until I felt I could see which group was right from a Scriptural point of view.
Having bounced back and forth between Calvinistic churches like Southern Baptist, Presbyterian, Reformed, etc., which teach the eternal security of a believer and Arminian type of churches, which comprise most of the rest of the denominations, I became thoroughly convinced that the Doctrine of Eternal Security was Scripturally correct. I cried out greatly to my heavenly Father about this important doctrine and I believe He divinely gave me the assurance the Doctrine of Eternal Security was correct. (I have since made an audio teaching entitled Saved to the Uttermost which dealt with that subject.) Taking that security away from a believer, I felt was putting them back under some system of Law or works. Salvation, according to the Bible is "By grace you have been saved through faith, and that not of yourselves; it is a gift of God, not of works, lest anyone should boast." (Ephesians 2:8,9) If the gift was not earned through works of doing good versus evil and if this gift was life eternal, then it could never be lost or else it would not be eternal. One cannot lose something that is eternal or else it becomes temporary. Jesus promised a quality of life which would pass through all the ages. After death was conquered He would bring us into a fellowship with the Father which is described as the Father being "all in all." (1 Cor. 15:28) (I am not going to get into the dozens of Scriptures found in the Bible which give assurance to the believer that their life is completely secure in Him, but if anyone wants a copy of the tape on the subject, I'll gladly send it to them.)
I rebuke Got Questions for being Infernalistic, queerphobic, etc. however they have good articles on OSAS
https://www.gotquestions.org/Christian-lose-salvation.html
https://www.gotquestions.org/once-saved-always-saved.html
https://www.gotquestions.org/eternal-security.html
I rebuke Jesus-Is-Savior for being infernalistic, queerphobic, etc. however they have good articles on OSAS
https://www.dividedbytruth.org/BD/lose_salvation.htm
https://www.jesus-is-savior.com/Basics/saved_certain.htm
https://www.jesus-is-savior.com/Believer's%20Corner/Doctrines/eternal_security-ironside.htm
https://www.jesus-is-savior.com/BTP/Dr_Curtis_Hutson/eternal_security.htm
https://www.jesus-is-savior.com/Testimonies/no_works.htm
https://www.jesus-is-savior.com/Believer's%20Corner/eternal_security.htm
https://www.jesus-is-savior.com/Believer's%20Corner/Doctrines/eternal_security-hypocrisy.htm
http://www.jesusisprecious.org/fundamentals/once_saved_always_saved.htm
https://www.jesus-is-savior.com/Believer%27s%20Corner/Doctrines/secure.htm
https://www.jesus-is-savior.com/Believer%27s%20Corner/Doctrines/eternal_security-ironside.htm
https://www.jesus-is-savior.com/Believer%27s%20Corner/Doctrines/ezekiel_1824.htm
https://www.soulwinning.info/bd/security_verses_assurance.htm
Bible Verses
Hebrews 6:4-6 For it is impossible, in the case of those who have once been enlightened, who have tasted the heavenly gift, and have shared in the Holy Spirit, and have tasted the goodness of the word of God and the powers of the age to come, and then have fallen away
John 5:24 Truly, truly, I say to you, whoever hears my word and believes him who sent me has eternal life. He does not come into judgment, but has passed from death to life.
John 10:28 I give them eternal life, and they will never perish, and no one will snatch them out of my hand.
John 3:16 For God so loved the world, that he gave his only Son, that whoever believes in him should not perish but have eternal life.
Ephesians 4:30 the Holy Spirit of God, by whom you were sealed for the day of redemption.
Romans 11:29 For the gifts and the calling of God are irrevocable.
John 6:37 All that the Father gives me will come to me, and whoever comes to me I will never cast out.
John 3:36 Whoever believes in the Son has eternal life
Luke 15:24 he was lost, and is found.’ And they began to celebrate.
Revelation 21:7 and I will be his God and he will be my son.
John 10:27 - My sheep hear my voice, and I know them
Romans 8:9 You, however, are not in the realm of the flesh but are in the realm of the Spirit, if indeed the Spirit of God lives in you.
John 14-1 Do not let your hearts be troubled. You believe in God
Romans 8:38 For I am convinced that neither death nor life, neither angels nor demons, neither the present nor the future, nor any powers, 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
John 14:26 But the Helper, the Holy Spirit, whom the Father will send in my name, he will teach you all things and bring to your remembrance all that I have said to you.
Romans 8:26 Likewise the Spirit helps us in our weakness. For we do not know what to pray for as we ought, but the Spirit himself intercedes for us with groanings too deep for words.
1 Corinthians 6:19 Or do you not know that your body is a temple of the Holy Spirit within you, whom you have from God? You are not your own,
Isaiah 11:2 And the Spirit of the Lord shall rest upon him, the Spirit of wisdom and understanding, the Spirit of counsel and might, the Spirit of knowledge
Acts 1:8 But you will receive power when the Holy Spirit has come upon you, and you will be my witnesses
2 Corinthians 3:17 Now the Lord is the Spirit, and where the Spirit of the Lord is, there is freedom.
Luke 11:13 If you then, who are evil, know how to give good gifts to your children, how much more will the heavenly Father give the Holy Spirit to those who ask him!”
Ephesians 1:13 In him you also, when you heard the word of truth, the gospel of your salvation, and believed in him, were sealed with the promised Holy Spirit,
Acts 2:4 And they were all filled with the Holy Spirit
John 14:16 And I will ask the Father, and he will give you another Helper, to be with you forever,
Ephesians 1:13-14 In him you also, when you heard the word of truth, the gospel of your salvation, and believed in him, were sealed with the promised Holy Spirit, who is the guarantee of our inheritance until we acquire possession of it, to the praise of his glory.
2 Timothy 1:7 For God gave us a spirit not of fear but of power and love
2 Peter 1:21 For no prophecy was ever produced by the will of man, but men spoke from God as they were carried along by the Holy Spirit.
John 20:22 And when he had said this, he breathed on them and said to them, “Receive the Holy Spirit.
Romans 8:16 The Spirit himself bears witness with our spirit that we are children of God,
Job 33:4 The Spirit of God has made me, and the breath of the Almighty gives me life.
2 Corinthians 5:5 He who has prepared us for this very thing is God, who has given us the Spirit as a guarantee.
Romans 8:1-2 There is therefore now no condemnation for those who are in Christ Jesus. For the law of the Spirit of life has set you free in Christ Jesus from the law of sin and death.
2 Corinthians 1:22 And who has also put his seal on us and given us his Spirit in our hearts as a guarantee.