First of all, I honestly do not understand how the above two sentences relate to one another. But let me try to address them one at a time ...
Fair enough!
There are those things that we know, those things that we feel we know, those things that we can imagine, and (presumably) those things as yet unimaginable. Each set is dynamic, and the set of the unimaginable seems to shrink in fits and starts thanks to an almost magical combination of curiosity, ingenuity, and scientific method. But it's simply hubris to think that everything should bend to human inquiry. Ignorance isn't an argument but, rather, the absence of one.
Therefore?
Hmm...
Your point is well made, and my post was (admittedly) pretty clumsy. I'll try and articulate it more clearly.
As per the OP, I'm not making a knowledge claim.
Perhaps God exists. If so, then I am ignorant of him. Based on my best efforts, I've been unable to find such a being, nor evidence I'd see as sufficient to assume he exists. God is obviously defined in myriad ways, some of which could broadly approach my beliefs about the universe, if you squint enough. But not in any direct sense, and I'd personally see the use of the word God when referring to non-sentient processes as more confusing than enlightening anyway.
I am left to assume that God doesn't exist. Or that he is not interested in humanity generally or me specifically in terms of my day to day life, much as some deists believe. And further, I would assume I am not personally subject to any sort of unique treatment from this potential God, for that would appear hubris.
Or he exists, but not in the form, or with the aims we suppose, maybe.
In any of those cases, I'm uncertain how or why I should change how I act, and do I choose to act as if God does not exist.
Ultimately, I'm agnostic, but given that I find God unlikely, it seems better shorthand to describe myself an atheist, or an agnostic atheist if dealing with people to whom such a label would make sense.
Hopefully that helps clarify my meaning somewhat, but either being questioned or challenged on it is more than fine.