In 2013, His Holiness the Sakya Trichen (the 41st Sakya Trizin) provided this instruction on the value of retreat at Tsechen Kunchab Ling in Walden, New York, at the request of Fundación Sakya in preparation for the 2014 Hevajra retreat program in Spain.
Source: This teaching was obtained from Paramita Youtube.
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