How far reaching are God's powers?

[Mister Agenda]

I try, implicit bias/beliefs notwithstanding, to have exactly zero (0) unfalsifiable beliefs, 

I am curious then, is the assertion "All beliefs should be falsifiable" falsifiable or not? If so, can you prove that falsifiability is a necessary condition for the truth of a particular belief. Can't we have, for instance, a true but unfalsifiable belief ?

You can have a true but unfalsifiable belief; you just don't have any way to test it. Falsifiability is not a necessary condition for a particular belief to be true; Some people have an opinion that avoiding beliefs that can't be tested will increase the odds that the beliefs that they do hold will be correct; other people are certain that their unfalsifiable beliefs can't possibly be wrong.

Empiricism is a very effective way to support or criticize an assertion; if your belief is unfalsifiable, you can't have evidential support for or against it. If your belief is unfalsifiable, there is nothing in nature or logic that could be true that would show the belief to be false; it's really not in the realm of rational discourse. But that does not mean it isn't true.