It was at Cordova that Father Lewis wrote his first book. The quiet and solitude of the convent enabled him to devote more time to writing than he would have been able to do had he continued his apostolic journeys among the towns and villages of Spain. His first work was the celebrated "Treatise on Prayer and Meditation." Nicolas Antoine, a learned author, says of this work that of "all books of its kind, in any tongue or of any time, it deserves the first place." It soon became famous, and was even read by the Mahometan inhabitants of Spain, deadly enemies to Christianity as they were. In his preface to " The Introduction to the Creed," a later work, he himself tells how it worked the conversion of one of those infidels, a Moorish slave, called Hamelsi, who, touched by grace, after reading the " Treatise on Prayer," asked for baptism, and became a pious Christian. Lives of the some of the Sons of Dominic (1883)
St. Rose of Lima's favorite book of Ven. Louis was The Book of Prayer and Meditation--a book that laments the miseries of life and manifests spiritual contempt for the world. Once, she banished the devil's temptations by reading this book causing the devil to snatch the book from her and throw it onto a rubbish heap. Rose remained calm, certain that the Lord would return it to her, and she got it back.
"Consider that our eternal salvation is not only the greatest, but the only business we have,to which we ought to apply ourselves entirely lest we should do it ill."
"Salvation is our great and chief business; now a man's chief business takes up all his thoughts, andhardly gives him time to think of any other; and if this succeeds he comforts himself for the miscarriage of the rest." - Fr. Jean Croiset
"In this important matter [salvation], a sensible man is struck more strongly by the slightest doubt of the risk he runs than by the evidence of total ruin in other affairs in which the soul is not involved." - St. Leonard de Port-Maurice
"If anyone affirms that one can reach perfection without practicing exterior mortification, do not believe him; and even though he confirm this assertion by working miracles, know that his contentions are nothing but illusions." - St. John of the Cross
"A penitent is a man...who refuses himself the most innocent pleasures, because he had formerly indulged in the most criminal." -Tertullian
"...a religious and pious soul in the midst of the world, is always a singularity approaching to a miracle."
"... It is the multitude nevertheless, who tremble not. There is only a small number of just, which operates apart its salvation, with fear and trembling; all the rest are tranquil."
"...in order to merit salvation, you must distinguish yourself from the rest; in the midst of the world, lead a life to the glory of God, and resemble not the multitude."
"Behold the fruit which you ought to reap from this discourse; live apart; think, without ceasing, that the great number work their own destruction; regard as nothing all customs of the earth, unless authorized by the law of God; and remember, that holy men have, in all ages, been looked upon as singular."