I totally agree with Rene.
My response is a little longer.
I don't know that I have the answer for you and I have questions too. I have to go back a re-read that study. I just remembered too that we are sealed with the Holy Spirit till the day of redemption (did I say that right?).
It is my understanding that had anyone lost God's Holy Spirit they wouldn't even be so much as curious or worried about it in the least. They would never search themselves and their hearts. Never say to themselves, "Oh man, I'm on shaky ground, Oh God, help me out of this--this is too much temptation for me. You gotta help me." They wouldn't be saying any of that.
Below are some examples of what it looks like to NOT have God's holy spirit.
Is this us:
Titus 1:16 They claim to know God, but they deny him by their actions. They are detestable,
disobedient, and disqualified to do anything good.
2 Timothy 3:8 Just as Jannes and Jambres opposed Moses, so these men also oppose the truth,
men corrupted in mind and disqualified regarding the faith.
Do we consistently and vehemently oppose the truth?
As Ray asked me rhetorically when I was concerned that I was one of those that God hated:
First he listed all these sins that some people consistently committed with NO regard for doing what is right. Then he said: "Gina, Do you do these things as a WAY OF LIFE?"
In other words, do you hate the truth?
Or, do you hate your sin? See?
Sin shall no longer have dominion over you, not that sin is completely eradicated from our lives.
Getting saved is the hardest thing we'll ever go through. It's a life-long process. God knows this. But it is serious business and that's why God is in control. Even our obedience is a gift of God (for it is God who works in you to will and to act according to his good purpose .. (Phil 2:13)).
Even when I had trouble with Ray and some of his teachings, and I mean I was really on a downward spiral, Ray could see that I was searching for the truth, he never said that I'd lost God's Spirit. Why? Because as angry as I was, he knew that I was searching for the truth and didn't understand. How? Because I was still there asking and giving him boatloads of grief. (Well, in my estimation it was boatloads; to him I was probably like a little gnat or something. hehe)