Guru Purnima is the festival of the guru; it is also known as Vyasa Purnima, as this is the day that Sage Vyasa completed dictating the Bhagavad Gita. On the festival of Guru Purnima, we were asked, ‘What is a guru, What is a Swami?’ We take some space here to consider Sanyasin, Swami, Acharya and Guru.