Guru Poornima is the most significant day in the entire calendar year for seekers of truth, harmony and happiness. In truth, it is the festival of thanksgiving for all on the spiritual path, irrespective of which religion one may belong to. In this Guru Purnima Sandesh, presented in the form of a slideshow, Pujya Bhaishri explains who these FOUR Gurus are and why we must express our gratitude to them on this divine occasion.