Man is made for attainment and achievement; to ever become greater and greater than he is now, that is is the purpose of his life; and to promote that purpose he must ever advance in the mastery of self. To move forward in the path of attainment, everything in the being of man must be employed constructively; every process in mind or body must become a building process, and all the elements and forces in the human system must work together towards the great goal in view; but to direct the whole of self to work for a greater self demands the mastery of self, and that is the purpose of this book.