> This seems to necessitate a state of affairs in which there is sin to be atoned for. It seems a fatalistic picture. If it was as you say a settled plan before creation, doesn't this mean sin is unavoidable?
Not necessarily a present or ever-existing state of affairs, but a knowledge of a future condition. I have knowledge even now (and I'm not even omniscient!) that there will be many losers in the March madness basketball tournament. This is neither a fatalistic picture nor a plan, but the nature of the beast. In the end, there will be one winner and many losers. In a tournament with this setup and nature, it is the inevitable outcome.
So was sin unavoidable? Yes. Anything created cannot have the same attributes as that which is uncreated. Therefore anything created is less than that which is uncreated. We were so susceptible to flaw, despite our nobility, that eventual sin was in the cards.
> There is a point when the thought is not in his head, then there is a point when there is. This implies change and ephemeral/non eternal characteristics.
Omniscience is tricky to pin down (just as is omnipotence) without loopholes, so we do the best we can. When we say that God is omniscient, we are undeniably talking about all things that are proper objects of knowledge. For instance, God doesn't know what it's like to learn, he doesn't know what it's like not to know everything, he doesn't know what would happen if an unstoppable force met an immoveable wall. These are absurdities. By omniscience we mean that God knows himself and all other things, whether they are past, present, or future, and he knows them exhaustively and to both extents of eternity. Such knowledge cannot come about through reasoning, process, empiricism, induction or deduction, and it certainly doesn't embrace the absurd, the impossible, or the self-contradictory.
To complicate the problem of defining omniscience, it can't be established what knowledge really is and how it all works. What are the principle grounds of knowledge, and particularly of God's knowledge? Does he evaluate propositions? Does he perceive? What about intuitions, reasoning, logic, and creativity? We consider knowledge to be the result of neurobiological events, but what is it for God?
But let's continue on to the true issue at hand: Is an omniscient being capable of thought? Of course he is, because thoughts are more than just knowledge, and they are more than just evaluating propositions, and the Bible defines God's mind as...
- creating new information (Isa. 40-48)
- showing comprehension
- gaining new information (Gn. 22.12, but it's not new knowledge)
- He orders the cosmos (Gn. 1)
- He designs (viz., the plan for the temple)
- He deliberates (Hos. 11.8)
- He can reason with people (the whole book of Malachi; Gn. 18.17-33)
- He can change a course of action (Ex. 32; 1 Sam. 8-12)
- He remembers (all over the place)
None of these conditions negates His omniscience.
Is God's omniscience propositional or non-propositional? Can God have beliefs (since beliefs can be true, and beliefs are different than knowledge)? Are God's beliefs occurrent or dispositional? As you can see, this can all get pretty deep pretty quickly. At root, a cognitive faculty is simply a particular ability to know something, and since God knows everything, his cognitive faculties are both complete and operational. Perhaps we can define God's omniscience as:
- Having knowledge of all true propositions and having no false beliefs
- Having knowledge that is not surpassed or surpassable
So I would say that generation of thoughts is not a process that invalidates His omniscience. If God is going to be responsive to human free will, which the Bible indicates He is (Jer. 18.1-12, Jonah 3), then thought does not imply a change of divine characteristics or a negation of His timelessness.