Hello Saxon,
Can you expound on what you have stated above, I don't understand what you mean. How could my believing in eternal security put me in a position where I don't know if I am saved?
OSAS kills any idea that anyone can know that they are saved and this is contrary to 1 John 5:13. John says that you may know that you have eternal life.

I have a friend that was saved, and “knew” that he was saved, but now he has nothing good to say about Jesus or the Bible. You are in the same predicament if OSAS is true, you do not know if you are saved. You could be the next one that thinks you’re saved and then turn back to your old ways. All OSAS has done, in reality, is sow the seed of doubt. As long as you believe OSAS and follow it to its logical conclusion, you can never know for sure if you are saved.

Most believers in OSAS will say that anyone that returns to their old life was never really saved to begin with.

1 John 5:13 These things have I written unto you that believe on the name of the Son of God; that ye may know that ye have eternal life, and that ye may believe on the name of the Son of God.