Preface THE few years that make up what is called a man's life, are of the utmost importance. They determine his entire eternity. Our Father in Heaven takes a deep interest in them, and does not wish them to be a failure. On our part, then, we should not misuse these years, and much less should we trifle them away. A pagan emperor mourned the loss even of one day. St. Paul tells us (Gal. vi, 10) that all our time is given to us to work good. The proper...