Moral Letters to Lucilius Section 22

Hoc a magno animi malo oritur. Quomodo in vino non ante lingua titubat quam mens cessit oneri et inclinata vel prodita est, ita ista orationis quid aliud quam ebrietas nulli molesta est, nisi animus labat? Ideo ille curetur; ab illo sensus, ab illo verba exeunt, ab illo nobis est habitus, vultus, incessus. Illo sano ac valente oratio quoque robusta, fortis, virilis est; si ille procubuit, et cetera ruinam sequuntur.

Cela provient d’une âme profondément malade. La langue du buveur ne balbutie point avant que sa raison ne soit appesantie, affaissée ou perdue ; de même ce genre et, pour dire vrai, cette ivresse de style n’attaque jamais qu’une âme déjà chancelante. C’est donc l’âme qu’il faut guérir : le sentiment, l’expression, tout vient d’elle ; elle détermine l’habitude du corps, la physionomie, la démarche. Saine et vigoureuse, elle communique au discours son énergie, sa mâle fermeté.

This is the result of great evil in the soul. As in the case of drink, the tongue does not trip until the mind is overcome beneath its load and gives way or betrays itself; so that intoxication of style - for what else than this can I call it? - never gives trouble to anyone unless the soul begins to totter. Therefore, I say, take care of the soul; for from the soul issue our thoughts, from the soul our words, from the soul our dispositions, our expressions, and our very gait. When the soul is sound and strong, the style too is vigorous, energetic, manly; but if the soul lose its balance, down comes all the rest in ruins.