Explaining how the progression of teachings in the three turnings of the wheel presents the clear light mind from different perspectives, leading us to enter Tantra in order to understand how to actualize such a mind, from the sections "The Three Turnings of the Dharma Wheel and Buddha Nature" and "A Link between Sūtra and Tantra", from Chapter 14, "Going Deeper into Buddha Nature"
Considering the four noble truths in terms of the three levels of practitioner, and looking at the truth of the unsatisfactoriness of cyclic existence.
