OSAS actually contradicts the following scriptures among many others. God protects our salvation giving us the grace and a way out of every temptation. He gives us the grace, but we have free will, to choose life or death with every temptation. So we have no excuse. God never forces anyone not to sin but provides away out.
God is faithful, who will not suffer you to be tempted above that ye are able; but will with the temptation also make a way to escape, that ye may be able to bear it.] God never violates our free will to choose life or death.
[2Pt2:20 For if after they have escaped the pollutions of the world through the knowledge of the Lord and Saviour Jesus Christ, they are again entangled therein, and overcome, the latter end is worse with them than the beginning. 21 For it had been better for them not to have known the way of righteousness, than, after they have known it, to turn from the holy commandment delivered unto them. 22 But it is happened unto them according to the true proverb, The dog is turned to his own vomit again; and the sow that was washed to her wallowing in the mire.]
[Hb6:4 For it is impossible for those who were once enlightened , and have tasted of the Heavenly Gift, and were made partakers of the Holy Ghost, 5 And have tasted the good word of God, andthe powers of the world to come, 6 if they shall fall away, to renew them Again unto repentance; seeing they crucify to themselves the Son of God afresh, and put him to an open shame.]
Are the unsaved enlightened? Can the unsaved taste of the heavenly gift? Can the unsaved partake of the Holy Spirit? Can the unsaved taste the good Word of God and powers of the world to come or would it be bad tasting to them? Can the unsaved fall away from all these things if they have never possessed them in the first place? Only the saved can possess these things and fall away crucifying Christ afresh.
Lk8:13 They on the rock are they, which, when they hear, receive the word with joy; and these have no root, which for a while believe, and in time of temptation fall away.]
[1Cor6:9 Know ye not that the unrighteous shall not inherit the kingdom of God? Be not decieved: neither fornicators, nor idolaters, nor adulterers, nor effeminate, nor abusers of themselves with mankind,] How many times does one have to be a fornicator, to be unrighteous? How many times does one have to be an idolater to be unrighteous?
[Gal5:19 Now the works of the flesh are manifest, which are these; Adultery, fornication, uncleanness, lasciviousness, 20 Idolatry, witchcraft, hatred, variance, emulations, wrath, strife, seditions, heresies, 21 Envyings, murders, drunkenness, revellings, and such like: of the which I tell you before, as I have also told you in time past, that they which do such things shall not inherit the kingdom of God.] How many times can one murder, engage in adultery, etc. to do the works of the flesh and not inherit the kingdom?
[Jms1:14 But every man is tempted, When he is drawn away of his own lust, and enticed. 15 Then when lust hath conceived, it bringeth forth sin: and Sin, when it is finished, bringeth forth Death.]
[1Jn2:1 My little children, these things write I unto you, that ye sin not. And if any man sin, we have an advocate with the Father, Jesus Christ the righteous: 2 And he is the propitiation for our sins: and not for ours only, but also for the sins of the whole world.]
If one can’t lose salvation what’s the point of having an advocate and propitiation for the sins of the saved?
[Gal6:7 be not deceived; God is not mocked: for whatsoever a man soweth, that shall he also reap.]