Ah, but they teach tenents of these false belief systems.
Security is only applicable to those abiding IN Christ bearing fruit... according to what Jesus taught in John 15
In order to hold the position of OSAS, one must only ascribe to a few happy verses and throw the rest of God's Word in the trash.
Galatians 6:7-8 (see Gen 8:22)
Be not deceived; God is not mocked: for whatsoever a man soweth, that shall he also reap.
For he that soweth to his flesh shall of the flesh reap corruption; but he that soweth to the Spirit shall of the Spirit reap life everlasting.
God gave man free will... if man chooses to turn and walk away from the Lord, God will let them do so.
Romans 1:28
they did not like to retain God in their knowledge, God gave them over to a reprobate mind, to do what ought not to be done
The gifts and callings of God are without repentance which means God cannot violate our free will and save us anyway IF we choose to go back to our sin which is living in darkness. In God there is NO darkness. (1 John 1:5)
This is a major biblical truth the OSAS crowd always explains away or denies is simply this... God is NOT mocked, what we sow is what we reap - if we sow to the flesh we shall of the flesh reap corruption. (Gal 6:7,8)
In Gal 6:8, the word corruption is...
G5356
fthora from G5351; decay, i.e. ruin -- corruption, destroy, perish.
G5351
strengthened from phthio (to pine or waste); properly, to shrivel or wither, i.e. to spoil or to ruin, by moral influences, to deprave): -- corrupt (self), defile, destroy.
If one claims we DO reap corruption when we sin, then they are admitting they do not believe OSAS / Eternal security doctrine (and sadly many of their friends will forsake them!).... and if one claims we DO NOT reap what we sow, then according to Gal 6:7, that would be mocking God!
Adam and Eve were given eternal life by the Lord when He created them... but when they sinned against God they became corrupt and died spiritually and became separated from God. So Gal 6:7,8 is quite the quandary, quite the state of uncertainty and perplexity for the adherents of OSAS doctrine.