"Epistles" is a collection of poetic letters offering insights into the human condition, moral philosophy, and the art of living well. Written in the first century BCE, the work reflects the author's mature thoughts on various subjects, ranging from personal ethics to literary criticism. Through these letters, the poet shares his wisdom with friends and notable contemporaries, employing a conversational tone that blends humor, irony, and sincerity. The epistles serve as a guide to practical wisdom, emphasizing moderation, self-awareness, and the importance of living in harmony with nature and society.

The book is a classical Japanese work that combines a diary and a collection of poetry by a noblewoman from the Heian period. It provides a rare glimpse into the life and emotions of the author, who served in the imperial court. The diary portion offers insights into courtly life, detailing the customs, events, and interpersonal relationships of the aristocracy, while the poetry showcases the author's literary talent and sensitivity to the natural and emotional world around her. The work is significant for its personal perspective on Heian-era culture and its contributions to the development of Japanese literature.

"Epistulae" is a collection of personal correspondence written by a prominent lawyer and author from ancient Rome. These letters provide a detailed insight into the social, political, and domestic aspects of Roman life during the late first and early second centuries. The author writes about a wide range of topics, from descriptions of daily routines and domestic affairs to significant events of the time, including the eruption of Mount Vesuvius. The letters are valued not only for their literary elegance but also for their detailed historical accounts and personal reflections, offering a unique glimpse into the author's character and the times in which he lived.