The most learned Tsele Perna Legdrub was the body- emanation of the great translator Vairochana, and he attained the pinnacle of learning and accomplishment of the masters of the Land of Snow. Also known as Kongpo Gotsang Natsok Rangdrol, he was 'unmatched in the three qualities of scholarship, virtue and noble-mindedness.

Among the five volumes of his collected works, I considered that The Circle 

of the Sun would benefit everyone interested in the Dharma. The words are clear and easy to under- stand and lengthy scholarly expositions are not emphasized. This text, easy to comprehend and containing all the key points and very direct instructions, results from following the oral advice of a qualified master.