Conclusion: it (God) does not exist.

Basically, time is a sequence of causal events (say, oscillations of a pendilum).

And thus, no one can "see" into the past or the future, simply because past events are already gone and future events have not happened yet.

Of course, you can expect certain behaviour of the system knowing laws and initial conditions, and the more information you have the more close your expectation can be to the actual behaviour of the system.

But do not forget, that microscopic objects being waves behave less definite than macroscopic, thus giving you growing with time margins of uncertainty and most of complex systems we know are made of microscopic objects (example: brain).