Consider the statement...
An Omniscient (all-knowing) Being Does Not Have Free Will.
If you are all-knowing, you know all your future actions, all choices you will ever make. Further, you cannot change any of them otherwise your knowledge would be wrong, and you would not be all-knowing. Therefore, an omniscient being has no free will to choose actions; all his actions are predetermined.
"There is a light switch on the wall; God may either turn it on, or leave it
off; but, since God already knows the future, God knows that he will turn it on.
That is part of his knowledge. But what if God exercises freewill, and chooses
not to turn it on. Is this possible?"
If you knew a decision you were going to make in the future... what would it mean? You would have no free will to change that decision. No option, no choices... based on the fact that you know its going to happen. It is predestined and no amount of strong-will can change it. The further in the future the predicted choice is, the less free will you have to change it! Well imagine if for infinity you had always known exactly what choices you were going to make, and you could never be wrong. You would never have had any free will in any choice, ever!
Following the reasoning of the above scenario God is reduced to nothing more than an observer. An omniscient being with no free will - His entire future is set out, and He has no choice but to follow His predestined path.
