First off, we are God. Our spirit is God and this physical realm is also God, they are just different forms of God. (Just like water takes different forms, but it's always "water") God's free will and omniscience is like this; let's say in 10 days you decide you're going to have an omelet for breakfast. You "know" the future, but with our free will, we can change the future. So you "know" the future, but that future can also be changed. This is how God works, he knows the future, he knows what the consequences of each action will be, but he doesn't know which action he (us) is actually going to take until we've taken it. He knows and doesn't know at the same time. Just like often we "know" what we're going to do, but a lot of the time it doesn't end up like we thought. In the end, yes, free will is just an illusion. But in the end, the entire universe is nothing but an illusion either. So I'll say in closing, that free will is as real and as unreal as the universe we can see. I'm probably not making much sense but, that's alright.