Let's return to our firefighter analogy. In the first case, the fire was accidental, and in the second, it was intentional. Now, when the fireman is trying to find out which of these cases is reality, and he finds the match, newspaper, curtain, and kerosene, and when he announces the fire to be intentional, we may say, "Ah, he has correctly determined the case of the flame."
Technically, that is wrong. Did the fireman determine or did he discover the cause of the flame? Clearly, the latter is accurate. Who, then, determined it? Clearly, the arsonist did. It was the arsonist who determined how the fire would start; the fireman discovered what the arsonist determined. Let's, then, bring that idea to our discussion.
You argue that ""Before" Creation (perhaps "at the instant of" would be a better term) God decided everything about Creation." Now, when you use the word "decided," you seem to be using it in the sense of "determined" above. But is it right that God determined everything about creation? That is, did God determine our choice? No, for as you yourself said, "at the moment of Creation he knew every "choice" we would make and then decided to make it this way thus fixing us to our "choices"."
Let's go back to the fundamental distinction I've been making throughout this discussion, which is the difference in the the nature of an action versus the knowledge of the nature of an action. The nature of my action is that it is freely determined (by me, relative to the logical choices I have to pick from). I, not God, determine what I will do. However, my actions are not self-existent. Their existence is dependent on me, on the reality with which I am presented, etc. And both me and reality are likewise dependent for their existence on God. Thus, there is absolutely nothing that exists on its own, but rather, God gives existence to everything, because He IS existence (we can unpack that more if you like). That is to say, God grants existence to everything, including my choices.
But that means that God did not determine my choices. What He did do was determine to make my choices a reality, but they are my choices still. You can say that God "sealed" me in my choices, but that does not change the fact that they are my choices. And further, by "sealing" me in my choices, all we are saying is that God gave existence to them. And can there be any other alternative? If God gives existence to ANYTHING, then He seals it in a state of existence. Why should that be any different in the case of my choice?
To return, then, to my basic conclusion: does the fact that God grants existence to my choices, and the fact that He fully knows what my choice is in granting that existence, have any bearing on the fact that, on the level of its nature, my choice is a self-determined choice? No, it does not. Thus we still see that even in Creation, man has (relatively) free will even as God is completely sovereign.
And you don't have to be a Calvinist do believe any of that . . .
