I was always perplexed by the OSAS concept. To some, it just seems like a free ticket to do the whole "Its okay, I'll be forgiven." I personally feel that a truly saved person is convicted not to sin. True repentance says you wont do "it" again. I honestly am on the fence whether or not I believe in OSAS. I can say, from personal experience, that when I was saved, I was convicted of many things and that in turn led me to change who I was and not be that person again. I believe, upon salvation, we are convicted to sin no more but to live for Him.
Okay, so, now we are saved. But we can not be perfect nor will we be perfect until we join Him. So, how does the whole thing work if we cannot sin (in theory) but we cannot be perfect? Then this brings the question; can someone fall away if they are truly saved? The theory is that if you are truly saved you cant fall away. I personally have so many wonders in my life since I was saved. I could not deny Him as He has shown himself to me in my life on numerous occasions. Why would you turn your back on that?
Have we given our lives completely to Christ? Is He driving or are you keeping Him as a co-pilot? If we are led by the Spirit we are not prone to sin. His will would never guide you to sin. How often I think we forget that we are saved because we are loved. Love will not guide us to harm or to sin. We are called to love, not to hate. We are called to be free of our bonds and not live bound by earthly ways. So, I guess you could conclude that if you are truly saved, then you could not fall away.
Its all about love, folks. He loves you. If you love Him, then you wouldn't turn away.
I guess its important to live like tomorrow could be one day too late.