"This brief book attempts to provide a 21st-century version of Seneca's classic essay, On the Shortness of Life. Like Seneca, Rickles seeks to motivate readers to meditate on how they use their time and offer some reasons why they mismanage this precious resource. Drawing on new developments in the understanding of time, the self, and human agency, in philosophy, psychology, neuroscience, and physics, Rickles's basic aim is to highlight the essential...