Dilgo Khyentse
Dilgo Khyentse spent 20 years in retreat. After completing a retreat at the age of 28, Khyentse spent many years with Dzongsar Khyentse Chokyi Lodro. After receiving from Khyentse Chokyi Lodro the many empowerments of the Rinchen Terdzo (the collection of Revealed Treasures or termas), Dilgo Khyentse requested to spend the rest of his life in solitary meditation. But Khyentse Chokyi Lodro answered, "The time has come for you to teach and transmit to others the countless precious teachings you have received."