Originally Posted by Timelord Victorious.
Because he gave us minds, to be independent. He wanted to see if we would vary what he already saw might happen.
He wouldn't need to. He already knows the outcome no matter what. He is 'all knowing of the past, present, and future'. How are we really independent if he has written our plans out and knows all our outcomes? That means we can't decide our own life at all actually.