@Secret: Depends on what you understand as "knowing". Mysticism and art fill the unknown with something, but it is debatable whether that which they fill in is knowledge. Most elaborate metaphysics end at the point that they can say "there (has to) exist(s) something unknowable", may it be labelled "The Negative", "Being", "Spirit", that is beyond finitude

I am actually not sure either. One definitely won't necessary call those complex emotions and thought arises when looking at artworks "knowledge"

What I can say though, is that the impression from looking at artworks often hard to pin down in words, so I am not sure what exactly I am dealing with

@Secret: Hölderlin called it intellectual intuition and came to the conclusion that the only appropriate means to get at that which is beyond knowledge/finitude (the real task of philosophical education) is art - in his case: poetry

This kind of "immediacy" is very controversial though, see e.g. Sellars' Myth of the Given

He even went as far as stating that true equality and overcoming of particularism and discrimination was only possible if the masses were educated to the point that they understand the finitude (and thus relativity) of all knowledge/judgement - early German revolutionary times, you know

I see, I am not familiar with these thus I guess I can add them into my reading list after finish reading about the mysticism article in the standford encyclopedia

Text I am referring to can be found in translation here

A book you might be interested in is The Myth of Disenchantment by Jason Ā. Josephson-Storm (2017)

Chapter three is about this episode of the German Idealism

The ideas build a lot on Kant's third critique, actually, as they highlight the outstanding status of aesthetics, i.e. Kant's statement that in beauty, we really conceive the world as it is since the feeling of awe we feel as beauty (or - related - morality) is induced by the full accord between the world and our perception of/access to it through our faculties (esp. reason)