"During the past few years, various friends have asked me, 'What do you mean when you speak about the spiritual life?' Every time this question has come up, I have wished I had a small and simple book which could offer the beginning of a response. I have felt that there was a place for a text that could be read within a few hours and could not only explain what the spiritual life is but also create a desire to live it. This feeling caused me to write...