I understand the Olamot (the four worlds) topologically.

What is given in Assiyah, the world of formation is anything that can be perceived, conceived and contained within the grasp of comprehension. This includes objective abstractions and all content of imagination. All content is Assiyah.

What is given in Yetzirah is all acts of formation — perception, conception or comprehension. Whatever subject contains objective content — however it does the containing — is Yetzirah. Yetzirah is active concavity: capacity for forming.

What is given in Beriah is the ground of differing formations. Between containments, objectivities, ontologies — between revelations of radically different enworldments — is inconceivable nonworldment, which we experience as dreadful void — abyss — from which ex nihilo revelation and creation irrupt.

What is given in Atzilut is the infinitely meaning of the absolute One, whose light floods in through whatever accepts its place within it, whatever no longer envies it and has shed its apotheotic ambitions.

Kabbalah is the practice of receiving all that is given.

Assiyah is objective, and that includes not only material objectivity (Malchut d’Assiyah) but all intentional objects, every possible object of any possible subjective operation. Only Assiyah can be thought about objectively — that is, in terms of definable objects of thought.

Yetzirah is subjective, and that includes not only (or primarily!) personal subject but all scales of subjective formation. Yetzirah is always and essentially participatory, and that participation enworlds and forms within an enworldment. Yetzirah is participatory enworlding.

Beriyah is what is given through sheer absence between enworldments. It is the ground of all enworlding and the truth of that ground, the truth that every objective world is enworlded. At its highest is the truth that between enworldment and enworldment lies dreadful, inconceivable nothingness from which enworldment proceeds ex nihilo, that something entirely beyond enworldment (enworldments, subjects and objects) is the condition of enworldment. It is, for us, the ex nihilo from which all revelation irrupts, by which we intuit creation ex nihilo.

Atzilut is the mystery beyond and behind Beriyah that transmits itself through the three lower worlds and gives worlds life and purpose and infinitude of possibility within absolute One.