De Vita Beata ("On the Happy Life") is a dialogue written by Seneca the Younger around the year 58 AD. It was intended for his older brother Gallio, to whom Seneca also dedicated his dialogue entitled De Ira ("On Anger"). It is divided into 28 chapters that present the moral thoughts of Seneca at their most mature. Seneca explains that the pursuit of happiness is the pursuit of reason – reason meant not only using logic but also understanding the processes of nature. De Beneficiis (On Benefits) is a first-century work by Seneca the Younger. It forms part of a series of moral essays (or "Dialogues") composed by Seneca. De Beneficiis concerns the award and reception of gifts and favours within society and examines the complex nature and role of gratitude within the context of Stoic ethics. De Ira (On Anger) is a Latin work by Seneca (4 BC–65 AD). The work defines and explains anger within the context of Stoic philosophy, and offers therapeutic advice on how to prevent and control anger. De Clementia (frequently translated as On Mercy in English) is a two-volume (incomplete) hortatory essay written in 55–56 CE by Seneca the Younger, a Roman Stoic philosopher, to the emperor Nero in the first five years of his reign. De Clementia is an instructional contrast between the good ruler and the tyrant, and an evaluation of the relationship between ruler and subject. A survey of history is made in the first volume to select different rulers to point out as examples, including Dionysius of Syracuse and Sulla being used as cautionary tales and young Augustus as the exemplar. An extended illustration of Augustus showing mercy to the rebellious Cinna alongside an example from Nero's own life is meant to encourage the aspiring emperor to likewise show clemency.
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