This booklet comprises of class talks given by Swami Vivekananda to an intimate audience in America. Here the subject of practical spirituality in the form of Raja Yoga is presented in a very lucid and succinct form, offering many valuable hints and directions for spiritual practice. The book is thus designed to be a precious and authoritative guide for all serious students of practical religion.
We cannot see outside what we are not inside. The universe is to us what the huge engine is to the miniature engine; and indication of any error in the tiny engine leads us to imagine trouble in the huge one.
-Swami Vivekananda