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.
MUL MANTRA. This is the title commonly given to the opening lines of the Guru Granth Sahib, Sikh scripture, or to these lines when they or a portion of them are repeated at the beginning of each new raga section as contained in the Holy text. This is the primary or fundamental formula of the Sikh faith. Transliterated into Roman script it would read: (ik) oankar satinam karta purakhu nirbhau nirvairu akal murati ajum saibhan gurprasd di. The English paraphrase, given the inherent inadequacies of the genre translation, would read, "God is one; call Him Eternal truth; He is the Supreme creator; He knows no fear and is at enmity with none.
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`.
QUDRAT (spelled qudrati in gurbani), a term adopted by Guru Nanak from the Arabic and given a philosophical signification and connotation which, to some extent but with different shades of sense, had till then been conveyed by the milenniaold Indian words prakriti and mdyd. Qudrat, in Arabic, literally means power, might. In the Turkish language, the word came to mean power, strength, omnipotence of God, as also Creation. The same term, in Persian, denotes power, potency, authority of God, the Creation, Universe, Nature.
SIKH COSMOLOGY. From the very beginning man has been curious to know about the structure and constitution of the Universe and its origin. To locate the stable base of this universe and to fix his own place in it have been the subjects of his constant search and speculation for him. The Gurus brought their own mystical and philosophical powers to solving the riddle. In their poetry in the Guru Granth Sahib, they have expressed their sense of wonder and sung paeans of praise for the Almighty. A minute observation of the phenomenon of nature forms an important part of the Sikh metaphysical insight.