A poet, a physicist, and a philosopher explore the greatest enigmas of the universe in this scintillatingly original book about the limits of human knowledge.Argentine poet Jorge Luis Borges was madly in love when his life was shattered by painful heartbreak. But the breakdown that followed illuminated an incontrovertible truth-that love is necessarily imbued with loss, that the one doesn't exist without the other. German physicist Werner Heisenberg was fighting with the scientific establishment...