An excellent introduction to Upasana Yoga - though condensed, a lucid introduction!!! Thanks for this write up on the 4 disciplines and the 4 aspects of mental disciplines required for Sadhana. They are not only required for Sadhana, even for day to day living. I specifically liked line - "In speech, there must be quality and quantity control" - for the simplisity of expression. Just this morning, I was thinking about the necessity for non-hurtful speech, while I observed that my kid aped whatever I did - if I screamed, he screamed back. Your post was like an answer. -Gayathri.