books.google.co.jp - In the Tibetan tradition the ability to dream lucidly is not and end in itself rather it provides as additonal context in which one can engage in advanced and effective practices to achieve liberation. Dream yoga is followed by sleep yoga also known as the yoga of clear light. It is a more advanced practice...http://books.google.co.jp/books/about/The_Tibetan_Yogas_Of_Dream_And_Sleep.html?hl=ja&id=fWz55-rCLbsC&utm_source=gb-gplus-shareThe Tibetan Yogas Of Dream And Sleep
