Free Will and Biblical Prophecy: Are They Mutually Exclusive?

General Relativity (GR) is a phenomenally successful model of reality at the large-scale. GR shows us that circular paths in time (closed-timelike curves, or CTCs) are not only theoretically possible but, in some space-times, endemic. Sadly, in practice, they are likely to be highly unstable. But even so, theoretically we can have arbitrarily accurate foreknowledge of anything you care to consider by careful use of time-travellers. We do not need any concept of omniscient beings or prophecies. How's your free-will holding up?

Space-time is a four-dimensional solid. Past, now, and future all equally exist, and are just a matter of perspective. At least, that is the picture we gain from GR.

Backwards time-travel is very likely to be impossible in practice: time-machines are inherently highly unstable. Also, a time-machine cannot take you further back in time than the time the machine first becomes operational, so if you want to see dinosaurs, you'll need to find either a naturally occuring time-machine, or a friendly alien who will lend you his.