This is the first discourse by Sadguru Sri Madhusudan Sai in the ‘Master the Mind’ series. The discourse was delivered on 28th April, 2020 on the occasion of Shankara Jayanthi. Here, Sadguru describes the life of Adi Shankaracharya and highlights his seminal contribution to the revival of sanātana dharma. He explains Shankara’s proclamation of advaita vedānta and the tradition of guru śiṣya paramparā. Sadguru goes on to elaborate on the three phases in the dissemination of advaita vedānta led by Adi Shankara, Vivekananda and Bhagawan Sri Sathya Sai Baba. He also briefly introduces the concepts of vedānta, samādhi, jñāna, jīvanmukti (Constant Integrated Awareness) and sannyāsa.