(IFF) god created everything and sees everything and knows everything (THEN) that still doesn't help us humans see stuff and know stuff.
In order for a human to call something "true", that phenomenon (or idea) must be (EITHER) empirically verifiable (OR) logically necessary.
Any "thing" that is NOT empirically verifiable and also NOT logically necessary CANNOT be categorized as "true" or "extant".
It is important to maintain a constant awareness of and vigilant respect of our epistemological limits.
Check this out, it was made by a Christian philosopher,
RE: MAGNUM MYSTERIUM