Tiger wrote:You are right. So far I haven't come across instructions about practices the way I found them in Amitayur Dhyana Sutra, but I guess I will have to read them further to understand. I would like to extend my questions to broader domain of all the Sutras. If there are any practices mentioned in any Sutras that we practice on our own, how safe would that be? Is the warning about dangers only valid if we attempt to practice Yogas and Tantras on our own or they exist for Sutras as well?
If I am understanding your question, I will answer to the best of my understanding, as I am not a trantric teacher.
In general, yoga meditational practices are 'safe'. That said, note that any
meditation practice can hold psychological 'traps' for some persons, depending on their individual psyche. Practices based in Tantrayāna/Vajrayāna, however, usually involve a specific type of 'Guru-yoga', which must be practiced with a teacher. These are often called 'secret' teachings, as they must be transmitted and empowered by the teacher to the student, so they are not revealed to the 'uninitiated'.
Sutrāyāna practice, however, has no such restrictions. Anyone may perform sutrā recitations, chant mantras, or engage in general yoga-style meditation. Saṃdhinirmocana Sūtra is beautiful sūtra, with many profound teachings of Buddha. Cleary's translation into English may not be entirely precise, but it is one of the more beautiful to read and contemplate. Too bad Shambala tried to promote it as a 'yoga manual'.
Hope this helps.