If only those who endure to the end are truly saved, as is eternal security according to the Lordship Salvationist, then how is assurance even possible? According to them, it isn’t. The only assurance of persevering is to persevere! What they are attempting to do is keep the believer in a place of doubt so that, motivated by fear, they will do good works. But is this really their aim? Surely we have been freed from sin but there is a huge difference between thinking I am free from sin so therefore I do not sin and being free from sin because I have died to the fact that I do sin. The former is a delusion and the latter the only way to godliness sinful man has ever known for we were crucified with Christ and our sin dealt with by Him who said, “It is finished!” Place a man under the principle of law (do this and then I will do that) and you will get nothing but more sin – “for the strength of sin is the law” (1 Cor 15:56). Perhaps it could be said that this is, more accurately, their true goal for false doctrine inevitably begets false practice.
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For a believer to say, “Am I really saved?” is to say, “Did Jesus really die for my sins?”
First of all, it is necessary for you to argue against Catholic teaching as opposed to something else. I am not at all certain that you understand the Catholic position. Please be advised that Catholic have an assurance of salvation, but the assurance is not the same as that found in OSAS. We do not have a metaphysical assurance/absolute certainty. Instead, we have a moral certainty based on God’s promises concerning salvation. Only God knows who is and who is not saved.
You are wrong about freedom from sin. Scripture makes it abundantly clear that the freedom given to us is “freedom from commiting sin.” I will show this by way of scripture.
Freedom from sin by grace
John 8: 31-36
Then Jesus said to the Jews who had believed in him, “If you continue in my word, you are truly my disciples; and you will know the truth, and the truth
will make you free.” They answered him, “We are descendants of Abraham and have never been slaves to anyone.
What do you mean by saying, "You will be made free’?” Jesus answered them, "Very truly, I tell you, everyone who
commits sin is a slave to sin. The slave does not have a permanent place in the household; the son has a place there forever.
So if the Son makes you free, you will be free indeed.
Rom 6: 6
We know that our old self was crucified with him so that the body of sin might be destroyed, and we might no longer be enslaved to sin.
Rom 6:14-16
For sin will have no dominion over you, since you are not under law but under grace. What then? Should we sin because we are not under law but under grace? By no means! Do you not know that if you present yourselves to anyone as obedient slaves, you are slaves of the one whom you obey, either of sin, which leads to death, or of obedience, which leads to righteousness?
1 Jn 3:4-9
Everyone who commits sin is guilty of lawlessness; sin is lawlessness. You know that he was revealed to take away sins, and in him there is no sin.
No one who abides in him sins; no one who sins has either seen him or known him. Little children, let no one deceive you. Everyone who does what is right is righteous, just as he is righteous.
Everyone who commits sin is a child of the devil; for the devil has been sinning from the beginning. The Son of God was revealed for this purpose, to destroy the works of the devil.
Those who have been born of God do not sin, because God’s seed abides in them; they cannot sin, because they have been born of God.
Acts 13:39
by this Jesus everyone who believes **is set free from all those sins **from which you could not be freed by the law of Moses.
1 Peter 4:1-2
Since therefore Christ suffered in the flesh, arm yourselves also with the same intention (for whoever has suffered in the flesh
has finished with sin), so as to live for the rest of your earthly life no longer by human desires but by the will of God.
Please note that none of these verses mean that we will never sin. When examining the Greek for example in 1 Jn 3:4-9, it becomes clear that the apostle is talking about “continuous sin or a sinful life style.” Protestant commentaries make this very point. A christian might commit minor sins and even possibly a erious sin. These sins must be confessed and there must be true repentence. John’s letters address this point and I can give the chapters and verses if needed.
Catholic doctrine teaches that we are saved by grace alone. Our faith and works are all by way of God’s grace and all of the glory goes to God.