A lot of people really don’t like the idea (which is certainly in Calvinism but is present in varying degrees in all forms of Christianity) that you have free will and yet God is in control (or “sovereign”). Another way of seeing the tension is that God knew whether you were going to be saved before you were born, right? (If He didn’t, He wouldn’t know everything.)
One way I’ve tried to handle that in the past is to liken God to a human author. For example, is Darth Vader evil? Yes. He killed innocent people, and he did it on purpose, knowing it was wrong. However, didn’t George Lucas really design the whole Star Wars universe, characters, and plot line? So there’s a sense in which Lucas “made” Vader turn evil. And yet, nobody thinks George Lucas is a murderer. In fact, a lot of people love him precisely because of the beautiful story of the fall and redemption of Anakin.
I hope you can see how the above is analogous to Christianity.
But now I’m saying something different. Back in the 1800s, the educated people believed that the physical universe was deterministic. So there was a sense in which your every bodily movement was already “set in stone” from before you were born (in their worldview). Yet they still had to live their lives, and act as if they had free will. They still held each other morally culpable for their actions. (Furthermore, it gets you nowhere to say, “It’s not his fault for robbing that bank! Look at the state of the protons in the universe at time T-2,” because we can say, “It’s not our fault for giving him the electric chair. We can’t help it.”)
So I think a Christian is in a similar situation. He knows that ultimately, even his bodily movements are carried along in an unstoppable current of God’s will, but yet he can’t help proceed as if he is making genuine moral choices.