This document provides an overview of metaphysics and related concepts. It defines metaphysics as the branch of philosophy concerned with the nature of existence, being and the world. Metaphysics refers to studies of what cannot be reached through objective material studies. The document discusses metaphysics from both a philosophical and religious perspective. From a philosophical view, metaphysics examines abstract concepts like causation and substance. From a religious view, it refers to concepts like the existence of God, life after death, and the soul. The document also discusses different metaphysical theories like materialism, idealism, theism, atheism and agnosticism. It describes the development of metaphysics alongside science.