Oral Mādhyamika Philosophy in Tibet : the Spoken Scholarship of Kensur Yeshey Tupden Commenting on Tsong-kha-pa's Illumination of the Thought, Extensive Explanation of (Candrakīrti's) "Entrance to (Nāgārjuna's) 'Treatise on the Middle Way'" : (dbu Ma Dgongs Pa Rab Gsal), the Sixth Chapter, "Perfection of Wisdom" Verses 1- 7