In monotheistic thought, God is conceived of as the supreme being, creator deity, and principal object of faith. God is usually conceived as being omniscient (all-knowing), omnipotent (all-powerful), omnipresent (all-present) and as having an eternal and necessary existence. These attributes are used either in way of analogy or are taken literally. God is most often held to be incorporeal (immaterial). Incorporeality and corporeality of God are related to conceptions of transcendence (being outside nature) and immanence (being in nature) of God, with positions of synthesis such as the "immanent transcendence".
Some religions describe God without reference to gender, while others or their translations use sex-specific terminology. Judaism, for example, attributes only a grammatical gender to God, using terms such as "Him" or "Father" for convenience.
God has been conceived as either personal or impersonal. In theism, God is the creator and sustainer of the universe, while in deism, God is the creator, but not the sustainer, of the universe. In pantheism, God is the universe itself. In atheism, there is an absence of belief in God. In agnosticism, the existence of God is deemed unknown or unknowable. God has also been conceived as the source of all moral obligation, and the "greatest conceivable existent". Many notable philosophers have developed arguments for and against the existence of God.
Monotheists refer to their gods using names prescribed by their respective religions, with some of these names referring to certain cultural ideas about their god's identity and attributes. In the ancient Egyptian era of Atenism, possibly the earliest recorded monotheistic religion, this deity was called Aten, premised on being the one "true" Supreme Being and creator of the universe. In the Hebrew Bible and Judaism, Elohim, Adonai, YHWH (Hebrew: יהוה) and other names are used as the names of God. Yahweh and Jehovah, possible vocalizations of YHWH, are used in Christianity. In the Christian doctrine of the Trinity, God, coexisting in three "persons", is called the Father, the Son, and the Holy Spirit. In Islam, the name Allah is used, while Muslims also have a multitude of titular names for God. In Hinduism, Brahman is often considered a monistic concept of God. In Chinese religion, Shangdi is conceived as the progenitor (first ancestor) of the universe, intrinsic to it and constantly bringing order to it. Other religions have names for the concept, for instance, Baha in the Bahá'í Faith, Waheguru in Sikhism, Sang Hyang Widhi Wasa in Balinese Hinduism, and Ahura Mazda in Zoroastrianism.
The many different conceptions of God, and competing claims as to God's characteristics, aims, and actions, have led to the development of ideas of omnitheism, pandeism, or a perennial philosophy, which postulates that there is one underlying theological truth, of which all religions express a partial understanding, and as to which "the devout in the various great world religions are in fact worshipping that one God, but through different, overlapping concepts".