The choice is in obeying God or not. God will never lose one whom he calls a child. We can sin, and we often do, but we cannot lose the love of God once he has chosen us. The choice is to obey or not obey.
But do I understand you to say that the freedom God gives in Christ does not mean a freedom to reject God, but one can on a case by case basis, so to speak, reject His instructions as to this or that moral decision?
Just spekkerlatin' here, with two examples:
(1) In the sheriff's office where I worked, if we were not in a building, a vehicle, or a fight, we were ALWAYS to have our Smokey Bear hats on. ALWAYS. You get out of your car and walk 5 steps to a door, you get out, put on your hat, walk five steps, open the door, walk in, take your hat off (and stand around awkwardly with this big ol' hat in your hand).
Some of the deputies who had been there longer than the Sheriff would NOT do this if the sheriff was out of town. But they didn't want to quit being deputies.
OR
(2) Sometimes as teenagers we "hate" our parents for a while. But we still love them, we've just kind of lost sight of that for a while ...
Is it kind of like one or both of those?