Moral Letters to Lucilius Section 7

Dicam, quomodo intellegam sanum: si se ipso contentus est, si confidit sibi, si scit omnia vota mortalium, omnia beneficia quae dantur petunturque, nullum in beata vita habere momentum. Nam cui aliquid accedere potest, id inperfectum est; cui aliquid abscedere potest, id inperpetuum est; cuius perpetua futura laetitia est, is suo gaudeat. Omnia autem, quibus vulgus inhiat, ultro citroque fluunt. Nihil dat fortuna mancipio. Sed haec quoque fortuita tunc delectant, cum illa ratio temperavit ac miscuit; haec est, quae etiam externa commendet, quorum avidis usus ingratus est.

Voici les signes où l’on reconnaît l’âme saine : contentement d’elle-même ; confiance dans ses forces ; conviction complète que tous les vœux des mortels, toutes les grâces qui se donnent et se demandent ne sont de nulle importance pour la vie heureuse. Car ce qui peut recevoir une addition quelconque est imparfait ; ce qui peut subir des retranchements n’est point perpétuel ; pour jouir d’un contentement perpétuel il faut le puiser en soi. Toutes ces choses auxquelles le vulgaire aspire bouche béante ont leur flux et leur reflux : la Fortune ne nous livre rien en propre ; mais ses dons même accidentels ont leur charme quand la raison les règle et les mélange avec mesure. Elle seule assaisonne ces avantages extérieurs dont usent les âmes avides sans les apprécier.

I shall tell you what I mean by health: if the mind is content with its own self; if it has confidence in itself; if it understands that all those things for which men pray, all the benefits which are bestowed and sought for, are of no importance in relation to a life of happiness; under such conditions it is sound. For anything that can be added to is imperfect; anything that can suffer loss is not lasting; but let the man whose happiness is to be lasting, rejoice in what is truly his own. Now all that which the crowd gapes after, ebbs and flows. Fortune gives us nothing which we can really own. But even these gifts of Fortune please us when reason has tempered and blended them to our taste; for it is reason which makes acceptable to us even external goods that are disagreeable to use if we absorb them too greedily.