Included in this volume are the dialogues On the Shortness of Life and On Tranquility of Mind, which are eloquent classic statements of Stoic ideals of fortitude and self-reliance. This selection also features extracts from Natural Questions, Seneca's exploration of such phenomena as the cataracts of the Nile and earthquakes, and the Consolation of Helvia, in which he tenderly tries to soothe his mother's pain at their separation.