Moral Letters to Lucilius Section 12

Adfectus sunt motus animi inprobabiles, subiti et concitati, qui frequentes neglectique fecere morbum, sicut destillatio una nec adhuc in morem adducta tussim facit, adsidua et vetus phthisin. Itaque qui plurimum profecere, extra morbos sunt, adfectus adhuc sentiunt perfecto proximi.

ou c’est priser trop haut ce qui a peu ou point de prix. Les affections sont des mouvements de l’âme répréhensibles, soudains et impétueux, qui, répétés et négligés, font les maladies ; de même qu’un catarrhe simple, qui n’a point passé à l’état chronique, produit la toux ; et la toux continue et invétérée, la phtisie. Ainsi les âmes qui ont fait le plus de progrès sont hors des maladies, mais ressentent encore des affections, si près qu’elles soient d’être parfaites.

“Passions” are objectionable impulses of the spirit, sudden and vehement; they have come so often, and so little attention has been paid to them, that they have caused a state of disease; just as a catarrh, when there has been but a single attack and the catarrh has not yet become habitual, produces a cough, but causes consumption when it has become regular and chronic. Therefore we may say that those who have made most progress are beyond the reach of the “diseases”; but they still feel the “passions” even when very near perfection.