
Work
On Tranquillity of Mind, Plutarch
On Tranquillity of Mind observes character in action and tests moral rules against concrete situations.
- Composition
- late 1st to early 2nd century CE; internal order uncertain
Sources and precision
The range locates Plutarch’s literary activity without inventing a composition year for each work.
Confidence C · probable range
- Tradition
- Socratic and Platonic thought
- Period
- Antiquity
- Languages
- Ancient Greek · English · French
- Extent
- 20 passages · 10,529 words
Before reading
What you will learn
To read On Tranquillity of Mind, isolate the decisive action, distinguish character from fortune, then compare its consequence with that of a neighboring course of conduct.
Short summary
On Tranquillity of Mind observes character in action and tests moral rules against concrete situations.
Long summary
The essay connects philosophical examination with ordinary actions, relationships, and habits in which character becomes visible.
Canonical identity follows the critical Greek CTS divisions. The historical English translation and AI-generated French remain distinct, labeled manifestations. Tranquillity depends less on changed fortune than on attention able to inhabit one's own share without coveting every other one.
Inside this work
The table of contents follows the divisions actually carried by the corpus.
Work › Section
Concepts covered
Historical context
The world around the text
The corpus manifests do not yet establish the precise place and circumstances of composition. The images below document the author’s world or the text’s transmission. They do not claim to show the exact scene of writing.
These are modern reconstructions. They situate a documented place, practice, or transmission and are not period documents.



What the world looked like
World of 1989




- State of technology
- Personal computers, satellites, video, industrial robots, and expensive mobile phones exist, but the public Web does not yet.
- Science and knowledge
- Computing, genetics, climate science, cosmology, and medical imaging produce growing data and international collaboration.
- Medicine and care
- CT, MRI, transplantation, vaccines, and intensive care advance; the AIDS epidemic exposes both medical capacity and its limits.
- Transport
- Cars, high-speed rail, metros, aircraft, and containers globalize people and goods.
- Agriculture and food
- Machinery, chemical inputs, breeding, and cold chains support high yields with increasingly debated social and environmental costs.
- Communication
- Fixed telephones, fax, television, radio, and newspapers predominate. Email and computer networks remain mainly professional or academic.
- Clothing and fashion
- Loose suits, jeans, trainers, women’s power suits, sportswear, and urban subcultures create highly varied silhouettes.
Editions, translations, and provenance
The following carriers represent the text. They do not create new passage identities.
- Ancient Greekcomplete_aligned_work
- Englishcomplete_aligned_work
- French AI-generated translation, non-officialCodex gpt-5.6-sol · Non-official working translation · 2026-09-13
Source manifests: plutarch.tranquillity_of_mind
Reader
Read page by page
Plutarch wisheth all health to his Paccius. It was late before I received your letter, wherein you make it your request that I would write something to you concerning the tranquillity of the mind, and of those things in the Timaeus which require a more perspicuous interpretation. At the same time a very urgent occasion called upon our common friend and companion Eros to sail directly to Rome; that which quickened him to a greater expedition was a dispatch he received from Fundanus, that best of men, who, as his custom is, always enjoins the making haste. Therefore, wanting full leisure to consummate those things justly which you requested, and being on the other side unwilling to send one from me to your dear self empty handed, I have transcribed my commonplace book, and hastily put together those collections which I had by me concerning this subject; for I thought you a man that did not look after flourishes of style and the affected elegance of language, but only required what was instructive in its nature and useful to us in the conduct of our lives. And I congratulate that bravery of temper in you, that though you are admitted into the confidence of princes, and have obtained so great a vogue of eloquence at the bar that no man hath exceeded you, you have not, like the tragic Merops, suffered yourself to be puffed up with the applause of the multitude, and transported beyond those bounds which are prescribed to our passions; but you call to mind that which you have so often heard, that a rich slipper will not cure the gout, a diamond ring a whitlow, nor will an imperial diadem ease the headache. For what advantage is there in honor, riches, or an interest at court, to remove all perturbations of mind and procure an equal tenor of life, if we do not use them with decency when they are present to our enjoyment, and if we are continually afflicted by their loss when we are deprived of them? And what is this but the province of reason, when the sensual part of us grows turbulent and makes excursions, to check its sallies and bring it again within the limits it hath transgressed, that it may not be carried away and so perverted with the gay appearances of things. For as Xenophon gives advice, we ought to remember the Gods and pay them particular devotions when our affairs are prosperous, that so when an exigency presseth us we may more confidently invoke them, now we have conciliated their favor and made them our friends. So wise men always ruminate upon those arguments which have any efficacy against the troubles of the mind before their calamities happen, that so the remedies being long prepared, they may acquire energy, and work with a more powerful operation. For as angry dogs are exasperated by every one’s rating them, and are flattered to be quiet only by his voice to which they are accustomed; so it is not easy to pacify the brutish affections of the soul but by familiar reasons, and such as are used to be administered in such inward distempers.