S1, E1: The word which first appeared in the mouth of Guru Nanak, is called as Mool Mantar. One says Vaheid, the first sentence of Guru Nanak was "ikk". From the Nirankaar God, the origin of the universe, Just like the rivers originating from the sea, every person has everything is different but the basis of all these pervasive unity is one. God is Anahata. Onkar is the base of the world.