We can suppose that there is a law of life that holds true beyond the exoteric social, religious and moral determinations we know - and maybe even beyond the biological and cognitive determinations that currently appear to be absolute.
One can be made aware of this law via arcana that interact with affect and language to generate states of consciousness. This is the task of Qabala, most broadly speaking
But Qabala is generally 'metaphysical' in a way that lacks scientific/discursive rigor on the one hand, and fails to engage in political negativity, on the other.
Transdendental Qabala joins the method of Qabala (thought as arcanum) to the field of post-Kantian thought.
To acknowledge Kant we have to re-spell the term: not an Arcanum but an Arkanum