All who wear the Brown Scapular of Our Lady of Mount Carmel are called to be Carmelites, at least of the Third Order. The author explains: "Those who are not specially interested in our Carmelite Tertiaryship, but desire to obtain a knowledge of Carmelite spirituality, are advised to read from chapter xi to chapter xv of this book. By Carmelite spirituality we mean the methods and principles of prayer and the interior life which inspire the lives and counsels of the three great saints, Teresa of Jesus, John of the Cross and Teresa of the Child Jesus. We trust readers will find in those pages in simple language all that is necessary to give them such an appreciation of the spirit of those saints as will make them resolve to take the means to acquire it. This book is devoted to the explanation of those means." Thus this book is dedicated to all of us who should have a Carmelite spirituality, following the great masters, Teresa of Avila, John of the Cross and Teresa of Lisieux. Chapter 11 begins with this from the Third Order Rule, which applies al all sincere Christians: "Tertiaries, following the advice of St. Paul, should be sober and earnest in the practice of piety, and avail themselves of all means calculated to foster it in their souls." The author explains: "In the language of the Apostles the word 'sober' has not the restricted meaning it bears in the English language. It rather means a calm." The Apostle then exhorts us to be temperate, deliberate, prudent, gentle and calm in all our actions. Tertiaries can best follow the advice of St. Paul and of their Rule in being sober and earnest in the practice of piety by striving after that active purgation or purification of which we have written in dealing with mental prayer. They will "avail themselves of all means calculated to foster it in their souls" by the greatest fidelity to the various points of their holy Rule, to their vows, vocal and mental prayer, spiritual reading, examination of conscience, hearing of Holy Mass and the frequentation of the Sacraments." We pray this book will help all to acquire the true spirit of Our Lady of Mount Carmel and her humble devotees.