 Perhaps his most controversial view was that Ultimate reality or Primordial Mind is an impermanent phenomenon and that this is supported by Yogacara, Sutra and Tantra.Since his views conflicted with those of Sakya Pandita, they were not well received by the Sakya school.In the 17th century, followers of the politically dominant Gelug school proscribed his writings and shut down the printery where his works were kept.