Ineffable Magritte - does the Tao exist?

(these notes are based on an article in the web journal AEON) 
ineffable - too great to be described in words

Add captionRené Magritte, Variante de la tristesse (Variation of sadness), 1957. Oil on canvas, 50 x 60 cm. Kerry Stokes Collection, Perth. Photo: Acorn Photo, Perth. © VG Bild-Kunst, Bonn 2017.

Magritte (1898–1967) was a conjurer of enigmatic paintings. He did not see himself as an artist, but rather as a thinking human being who conveyed his thoughts through his painting. Throughout his life he sought to imbue painting with meaning equal to that of language. Driven by his curiosity and his affinities with some of the leading philosophers of his age, such as Michael Foucault, he created a remarkable body of work and developed an altered view of the world that is reflected in a unique combination of masterfully precise painting and conceptual processes.   - from the website Eflux, arts and ideas digest

I thought ineffable meant beyond words, a sealed, unknowable meta-reality.  All that can be explained about what is ineffable is a definition of non-knowable, to conceive that we do not know or cannot access the knowledge within.

But if language can discern or conceive something ineffable, then why cannot language explain what the content is?

Because language can conceive of paradox.
Ineffability is a conception and an example of a paradox.

What it isn't, is the inability of the speaker to describe or explain an experience  because of the limits of that individual's education or vocabulary, or unwillingness to attempt to, or his inadequacy to do so.

The idea took hold that ineffability is a symptom of the insufficiency of language to capture the ultimate truths of the world.

...the notion of ineffable truths relies on the notion of subjective facts, we should also give up the notion of ineffable truths

What may be ineffable, or inexplicable, is phenomenal experience - the experiences of the body, the physical, of color, of playing a violin.  

What is mysterious to me:

•the origin of the universe
•the issue of whether animals and plants are   sentient beings 
•why I am alive
•how the brain convinces us we are self conscious beings 
•what is the nature of subjectivity
• how conceptualize the magnitude of the universe