GOD, a term used to denote any object, of worship or evocation, signifies the belief of most modern religions in the existence of a Supreme Being who is the source and support of the spatio temporal material world. Theologians remember Him by the name of God. The fundamental belief of Sikhism, too, is that God exists, not merely as an idea or concept, but as a Real Being, indescribable yet not unknowable. The Gurus, however, never theorized about proofs of the existence of God. For them He is too real and obvious to need any logical proof.
ONKAR, generally written down as Oankar in Sikh Scriptural writings, is derived from the Upanisadic word Oankara (om+kara) originally signifying pronouncing or rendering into writing the syllable Om. Known as synonym of Om it has been used in the Vedic literature and, in particular in its religio philosophical texts known as the Upanisads, as a holy vocable of mystical signification and as the most sacred of the names of Brahman, the Supreme Self or the one entity which fills all space and time and which is the source of the whole universe including the gods themselves. The word om, the most hallowed name of Brahman, is derived, according to the Gopathabrdhmana (I. 24), from dp `to pervade` or from av `to protect`.
