I'm just going to play devil's advocate.
To coelho: How do you determine whether or not something happens without a definable cause? The determinist would argue that all things are reactions to actions, but we are incapable of observing every one of those actions.
To esoteric: You described epiphanies as your mind drawing connections between ideas that it previously hadn't. Why is this outside of a deterministic viewpoint? Computers are processing thousands of things at once, yet they are still based on an action/reaction reality. The determinists would say that our minds are merely super developed computers.