Guru Nanak Jayanti 2019 or Gurpurab 2019 will be celebrated across the world on November 12. The day celebrates the birth anniversary of the first Sikh Guru – Guru Nanak Dev. Guru Nanak, along with six Sikh Gurus, wrote down the principles of Sikhism in the Holy book Guru Granth Sahib. On the 550th birth anniversary or Parkash Utsav of Guru Nanak Dev ji, let's take a look at five teachings from the sacred book Guru Granth Sahib.