Against me and God, The only advantage He has… “He can test me.”

Against me and God, What advantage does GOD have?

Can God Change my Future?
Can God Change my Past?
I Can not change my future. And If God has already decided my future, even He can not Change it.
I can put all my effort to SHAPE  my future.
About past; Past is Gone. Neither can He change it, nor can I?
So what difference does it make between me and Him?
He can Test Me.
I would not test Him. 
I religiously believe he is there.