This book is an introduction to the spirituality of Isaac Thomas Hecker, the founder of the Paulist Fathers, the first order of American priests, begun in 1858. What is unique about this book is that Hecker was an American Catholic and that his spirituality evolved in American circumstances. Concise and engaging, it can be an important resource for lay as well as religious life. It can be a resource for those studying for ministry or those practising ministry, for campus small group discussions, as a workbook for pastoral staffs and lay councils as well as providing spiritual reading for retreats and houses of prayer.