In monotheism, God is conceived of as the Supreme Being and principal object of faith. The concept of God as described by most theologians includes the attributes of omniscience (infinite knowledge), omnipotence (unlimited power), omnipresence (present everywhere), divine simplicity, and as having an eternal and necessary existence. Many theologians also describe God as being omnibenevolent (perfectly good) and all loving.
God is most often held to be incorporeal (immaterial), and to be without gender, yet the concept of God actively creating the universe (as opposed to passively) has caused many religions to describe God using masculine terminology, using such terms as "Him" or "Father". Furthermore, some religions (such as Judaism) attribute only a purely grammatical "gender" to God. Incorporeity and corporeity of God are related to conceptions of transcendence (being outside nature) and immanence (being in nature, in the world) of God, with positions of synthesis such as the "immanent transcendence" of Chinese theology.
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, God is not believed to exist, while God is deemed unknown or unknowable within the context of agnosticism. 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.