Here the Stoic philosopher outlines his thoughts on how to live in a troubled world. Tutor to the young emperor Nero, Seneca wrote exercises in practical philosophy that draw upon contemporary Roman life and illuminate the intellectual concerns of the day. They also have much to say to the modern reader, as Seneca ranges widely across subjects such as the shortness of life, tranquility of mind, anger, mercy, happiness, and grief at the loss of a loved one.