books.google.com - Important small work dealing with the action of the Divine powers in the world and practice of yoga of Sri Aurobindo. Revelatory, inspired writing, frequently called the "Matri Upanishad."...https://books.google.com/books/about/The_Mother.html?id=sDP3-WFSJvgC&utm_source=gb-gplus-shareThe Mother
Sri Aurobindo has been considered one of the foremost philosophers of the 20th Century, but he was far more than just a philosopher. He was a political activist, a mystic, a spiritual leader and a poet, a yogi and a teacher.