So, to summarize: it's all unknowable.
Kind of curious that your post doesn't just end there then... Sounds like declaring it "unknowable" is kind of a conversation stopper.
Eum....
You JUST declared it as being unknowable. And even took your time in multiple paragraphs to express just how unknowable it is.
And then you say the above.... "..we can know.."
So which is it?
Can we or can't we?
One of both has to be wrong.
So apparantly Baha'u'llah knows the unknowable?
I always chuckle when people declare things unknowable and then proceed with making.... knowledge claims.
Firstly, God is not a human being as we are. We can not communicate directly with Him in His natural form so He sends His Representatives, His Prophets and Messengers in human form as Mediators to communicate with us according to our own capacity.
Verily, were God the Exalted to appear in His (proper) grade and form, and in a manner befitting His Station, no one could ever approach Him or endure to be near Him.
In every world, He appears according to the capacity of that world. For example, in the world of spirits He manifests Himself to them and appears unto them with the signs of the Spirit. So, likewise, in bodies in the world of names and attributes;
So at various times in history God has sent Messengers to assist us to grow and develop spiritually and to carry forward an ever advancing civilisation and to let us know of His existence and love for us.
No tie of direct intercourse can possibly bind Him to His creatures.
He is and hath ever been veiled in the ancient eternity of His Essence, and will remain in His Reality everlastingly hidden from the sight of men.
All we are told about God comes from These Manifestations. They tell us that God’s Essence is incomprehensible to all even Themselves but that God has revealed to us through Them knowledge of some of His attributes like love justice, mercy, compassion and so on and offers guidance to us as we evolve and progress.
Words in italic are all from Baha’u’llah’s Writings.
In a provisional translation He explains more about God and our limitations to know Him.
Tablet of the Manifestation