Sri Aurobindo's book The Mother is a highly concentrated and powerful guide to spirituality and yoga. Consisting of just six chapters, it provides inspiration and direction of the highest order and for many it acts as a lifelong companion on the journey. The sixth chapter, wich describes the Four Powers of the Mother is frequently called the Matri Upanishad and can rightfully take its place with those more ancient inspired texts. In Indian philosophy, the Mother represents shakti, the power and energy of creation. Santosh Krinsky has been studying the work of Sri Aurobindo for over 40 years. He brings his experience and insights to bear on the significance of this short, but significant, book. Santosh Krinsky has been studying Sri Aurobindo's The Life Divine since he was introduced to it in 1971. After residing at Sri Aurobindo Ashram in India for part of 1973-1974, he returned to the USA where he has been involved in the distribution and publication of the major writings of Sri Aurobindo. He founded Lotus Press which today is one of the leading publishers in the field of Ayurveda and alternative healing modalities, as well as being the US publisher of Sri Aurobindo's major works. Santosh is also one of the founders and currently the President of a non-profit organization The Institute for Wholistic Education, which is dedicated to the work of integrating spirituality into daily life.