Discoverer of set theory Georg Cantor explored the concept of "everything" (everything relative and "The" Absolute), calling "It" The Class of All Sets. Various images of the Totality of existence may be found throughout history. Legend has it that Aristotle came up with a diagram but unfortunately it's lost. From a Spiritual pov, some ideas associated with the Totality of existence are: a. embodies the sum total of natural laws. b. the whole is greater than the sum of its parts c. may be address (or even worshiped) as something "in itself" without emphasizing the piecemeal parts of the Totality. d. Apparently, Aristotle, some Renaissance thinkers, and Seers from the Hindu and Buddhist traditions were well aware of the concept of the "Totality", or the Great Chain of Being. e. The Totality (everything, or Brahman) is Holographic in its fundamental nature.
In the West staring in the Age of Enlightenment, the notion of the Totality became less important than the parts, and various naturalists argued over the nature of the internal Hierarchy (if indeed one exists at all). Eventually by the end of the 19-th century, the idea of a Totality was virtually lost, having been replaced by emphasis on the nature of "parts". In recent years, the idea of the Multiverse has become fashionable, but this entity is purely Naturalistic, devoid of the traditional population of Devas and interdimensional beings. The Judaeo-Christian diagram of the Great Chain of Being naturally puts the Biblical Deity at the top, and there's no provision for Purusha. OTOH, the concept of Purusha is depicted in mandalas from the East such as Nichiren's Gohonzon, and even in the Mayan Tzolkin. Here's the image of the Great Chain of Being from the Renaissance era: https://en.wikipedia.org/wiki/Great_chain_of_being#/media/File:Great_Chain_of_Being_2.png https://en.wikipedia.org/wiki/Great_chain_of_being#/media/File:Great_Chain_of_Being_2.png
