Online lecture given by Swami B.P. Padmanabha on December 1st, 2021 at Sofia, Bulgaria; Q & A (Gadadhara Pandita´s Initiation and Advaita Acarya´s Age, Unfolding the Three Reasons for Mahaprabhu´s Descent, How to Approach our Singing of Kirtana, Vaidhi-bhakti and Ajata-ruci-raga-bhakti)