Seneca · On the healing power of the mind

Letters 78.1

That you are frequently troubled by the snuffling of catarrh and by short attacks of fever which follow after long and chronic catarrhal seizures, I am sorry to hear; particularly because I have experienced this sort of illness myself, and scorned it in its early stages. For when I was still young, I could put up with hardships and show a bold front to illness. But I finally succumbed, and arrived at such a state that I could do nothing but snuffle, reduced as I was to the extremity of thinness.

Seneca, Letters to Lucilius 78.1, translated by Richard Mott Gummere