Extensive Explanations Given on the Text From 17 July - 10 October 1979

3. The Last Four Vajra Points: Element, Enlightenment, Qualities and Activity

Detailed explanation of the last four points describing the way the Three Jewels are attained:
B.II.2.2.1. General explanation of the four points considered together
B.II.2.2.1.1. Explanation of the four points as being the object of perception of a Buddha

Talk 13, 30 July 1979: 

B.II.2.2.1.2. Explanation that they are inconceivable
B.II.2.2.1.3. Explanation why they are inconceivable

Talk 14, 31 July 1979: 

Talk 15, 1 August 1979: