In monotheism and henotheism, God is conceived of as the Supreme Being and principal object of faith. 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.
God is also usually defined as a non-corporeal being without any human biological gender, but his role as a creator has caused some religions to give him the metaphorical name of "Father". Because God is concieved as not being a corporeal being, he cannot (some say should not) be portrayed in a literal visual image; some religious groups use a man to symbolize God because of his role as the "father" of the universe and his deed of creating man's mind in the image of his own.
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 does not exist, while God is 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". Many notable philosophers have developed arguments for and against the existence of God.