God is often conceived as the Supreme Being and principal object of faith.[1] The concept of God as described by theologians commonly includes the attributes of omniscience (infinite knowledge), omnipotence (unlimited power), omnipresence (present everywhere), omnibenevolence (perfect goodness), divine simplicity, and eternal and necessary existence. 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. Monotheism is the belief in the existence of one God or in the oneness of God. In pantheism, God is the universe itself. In atheism, God is purported not to exist, while deemed unknown or unknowable within the context of agnosticism. God has also been conceived as being incorporeal (immaterial), a personal being, the source of all moral obligation, and the "greatest conceivable existent".[1] Many notable medieval philosophers and modern philosophers have developed arguments for and against the existence of God.[2]

There are many names for God, and different names are attached to different cultural ideas about God's identity and attributes. In the ancient Egyptian era of Atenism, possibly the earliest recorded monotheistic religion, this deity was called Aten,[3] premised on being the one "true" Supreme Being and Creator of the Universe.[4] In the Hebrew Bible and Judaism, "He Who Is," "I Am that I Am", and the tetragrammaton YHWH are used as names of God, while Yahweh, and Jehovah are sometimes used in Christianity as vocalizations of YHWH. In Judaism, it is common to refer to God by the titular names Elohim or Adonai, the latter of which is believed by some scholars to descend from the Egyptian Aten.[5][6][7][8][9] In Islam, the name Allah, "Al-El," or "Al-Elah" ("the God") is used, while Muslims also have a multitude of titular names for God. In Hinduism, Brahman is often considered a monistic deity.[10] Other religions have names for God, for instance, Baha in the Bahá'í Faith,[11] Waheguru in Sikhism,[12] and Ahura Mazda in Zoroastrianism.[13]

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,[14][15] 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 or mental images of him."[16]