“Pillars of Metaphysics” by Rubén Cedeño is the basic text that supports the “Internal Metaphysical Teaching” where its objetives and essential contents are explained, which, if practiced, seek inner development. It is the author’s most published and sold book. The 2023 version of “Pillars of Metaphysics” differs from all its previous editions; it includes new terminology, nomenclature, definitions, contents, and updated subtitles. It consists of 17 chapters in approximately 200 pages. More than 40 editions of this work have been made, including some in Italian, French, Portuguese and English.