Eternal philosophy

Perpetual Philosophy by Aldous Huxley... Huxley wanted this book to be an ontology (the study of the existence) of perpetual philosophy, so we find him quoting the sayings of most religious traditions in every time and place. He classified those sayings under the headings of his chapters, in order to explain most of the dimensions of this The eternal philosophy that we find in the hearts of believers and Sufis, that philosophy that believes that all religions arose from a single essence, even if its manifestations are multiple.