Consciousness.  When we get the GurParsaad and then do Naam Ki Kamai then our consciousness, Birti, keeps on going higher and higher and a time comes when we physically realize this super divine power within our own self and are blessed with the Puran Brahamgian.  When this happens we merge in the Nirgun Saroop of Dhan-Dhan Paar Braham Parmeshwar Ji.  We go from lower animal consciousness to the highest state – Truth Consciousness.  Truth Consciousness is also called Nanak Consciousness, Christ Consciousness it is a God conscious being.  Lower consciousness means the ones who are living in the three aspects of Maya – Rajo Birti, Tamo Birti and Sato Birti.