And ALL can be known
1 Corinthians 13:12
For now we see through a glass, darkly; but then face to face: now I know in part; but then shall I know even as also I am known.

We know in part.
So Paul refers to an implied knowledge yet that WE will receive in the future.

Where will that knowledge come from?
The one that created all things (remember the tree of the knowledge of good and evil?).

So Ricky
There is yet knowledge which by us can still be known – but not in our present state.

Now (where I will lose you).
Where does the Bible say that the GOD-HEAD as a WHOLE does not have this knowledge already?

It doesn’t, that is man’s interpretation to exalt humanity and lessen (God – as a whole).