"It is important here to underscore panentheism (with the en in the middle) which is not to be confused with 'pantheism' (without the 'en' in the middle). The former signifies the immanent nature of God without a transcendent spirit, whereas the latter is nature worship characteristic of many pagan faiths, at least as characterized by their opponents. Panentheism refers to the world as God and at the same time God remaining transcendent. This dual character of God is central to integral unity. God is the unchangeable transcendent and also everything that exists, and hence ever in flux. Charles Hartshorne, a prominent philosopher and theologian, introduced the term 'panentheism' into the Western lexicon after his detailed study of Hindu metaphysics in the 1930s (especially Ramanuja and Sri Jiva Goswami)."