In this teaching, Rinpoche introduces us to the framework of studies and research taught in Buddhist universities like Dzongsar Institute, giving a detailed outline of the tenet systems, their pioneers and their great philosophical writings. Rinpoche explains how all these studies relate back to the reflection on the “four philosophical schools” that is recited every Sunday Chenrezi at Sakya Monastery, so is relevant to all who want a deeper understanding of the Sakya tradition’s rich academic heritage.