If Calvinism were true then there can be no such thing as a serious warning of the form "FEAR - you stand only by your faith - if God did not spare them neither will He spare you" Romans 11.
Here we have one of the most clearly stated passage of scripture teaching that it is by faith alone which saves. This "alone" ,as a matter of fact, eliminates every objection given by the anti-osas camp with one exception, that is making a mental decision to stop believing.
So with any kind of sins, or fruits, or works of the law eliminated from having anything to do with justification by this verse, we are left with faith being the ONLY measure by which one is proved justified.
So do we have any bible verses which speaks of those who appear to believe for awhile but later stop following Jesus Christ?
Yes, we do....
John 8; "Then said Jesus to those Jews which believed on him, If ye continue in my word, [then] are ye my disciples indeed; And ye shall know the truth, and the truth shall make you free." By the time this dialogue with these who "believed on Him" was finished, some were picking up stones to kill Jesus. They manifested that they were not true believers.
1John 2: "They went out from us, but they were not of us; for if they had been of us, they would [no doubt] have continued with us: but [they went out], that they might be made manifest that they were not all of us."
Col 1: "If ye continue in the faith grounded and settled, and [be] not moved away from the hope of the gospel, which ye have heard, [and] which was preached to every creature which is under heaven; whereof I Paul am made a minister;"
And we have the
"if so be" scriptures.....
Ro 8: "But ye are not in the flesh, but in the Spirit, if so be that the Spirit of God dwell in you. Now if any man have not the Spirit of Christ, he is none of his."
Ro 8: "And if children, then heirs; heirs of God, and joint-heirs with Christ; if so be that we suffer with [him], that we may be also glorified together."
1Cr 5: "If so be that being clothed we shall not be found naked."
Eph 4: "If so be that ye have heard him, and have been taught by him, as the truth is in Jesus:"
1Pe 2: "If so be ye have tasted that the Lord [is] gracious."
Matt 7: "Not all who say to me Lord Lord shall enter into the kingdom of heaven, but those who do the will of my father in heaven".
And what is the will of the Father, to believe on His Son Jesus Christ...
John 6: "Then said they unto him, What shall we do, that we might work the works of God? Jesus answered and said unto them, This is the work of God, that ye believe on him whom he hath sent."
So we see how the scriptures teach that a person can appear to be a believer, maybe tag along with the crowd or buddy pack, and then be manifested that they were never true Christians. These are only a few of the many scriptures supporting faith alone and the wheat verses the tares we find all throughout the scriptures.
In the end, only Jesus knows for 100% those who are His, we are not to go around making judgments by how much fruit we see, or how much love we see, or how much obedience we see.
...."you stand ONLY through faith"