Who was the real Guru Nanak? Why not take a look at Gurbani?

Who was the real Guru Nanak? A hyper-liberal pacifist? A renunciative Buddha-like Saint? A Vedic sage? Some Pooran Tam Avatar? Or was he something radically different? We are joined by Professor Balwant Singh Dhillon (GNDU) to seek out Baba Nanak's own testimony as to who he was within the Guru Granth Sahib and to prove that Baba Nanak envisioned the rise of the Khalsa and the Panth's sovereign ascendancy.