God does NOT determine all things that happen, some he does, some he allows to happen...
Not being in His mind makes perfect sense, as He would NOT even be able to have thoughts involving ordering sin to be commited!
he knows ALl things that will evr come to pass, and what could have happened, but would NOT know things such as dterming sin acts, for not in His very nature!
You are contradicting yourself, you just said God predestines all things.
God has a Will, Nothing happens that he does not know, and he is in control over history, that he predetines all things after His own good pleasure/purposes...