In this ground-breaking book, Antoinette Louisa Brown Blackwell discusses the philosophical and scientific principles that underpin the concept of immortality. Using insights from fields such as biology, chemistry and neurology, she offers a compelling argument for the possibility of extending human life beyond its natural limits. This is a must-read for anyone interested in the intersection of science and spirituality, and for those who seek to understand the mysteries of the human lifespan.This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it.This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.