Filled with research and personal anecdotes, a scientist and poet provides a fascinating exploration into how science has shaped our identity by examining the elements of our immune systems such as the thymuses, bone marrow, and lymph nodes to show how they define us in extremely individual ways, and reveals how faith and love are in fact programmed into our genes. Reprint.Examines the elements of our immune systems such as the thymuses, bone marrow, and lymph nodes to show how they define us in extremely individual ways, and reveals how faith and love are in fact programmed into our genes.