This introductory chapter provides a brief overview of Pascal’s legacy, his renown and neglect throughout the centuries, and his profound influence on philosophy, science, religion, and much else. The metholodgy of this book is then addressed: the aim is not primarily exegesis, though there will be plenty of that too. Rather, the aim of the book is to argue that there is much in Pascal’s work that is philosophically relevant to us today. Our cultural, social, political, and technological moment requires a deep look at our natures and aims, and this is what Pascal’s philosophy can offer, if we can get past the sometimes obscure theological disputes he was engaged in and the fragmentary nature of his writings. An overview of the book’s chapters is then provided.