Δαφνη Ευτυχια Αρθουρος

"There are all kinds of myths and taboos linked to our bodily fluids. Blood, for instance, plays a big role in religions. It can stand for vitality, purgation, forgiveness and healing. Blood can be warm or cold. It was also one of the 'four humours' of the Greeks, the others being black and yellow bile, and the subject here -- phlegm.

[...]

"Of course tears play a heavy role in literature, film and art, and they have a palliative effect and can easily infect a sympathetic audience.

"But snot is never praised by artists or priests.

"It's simply gross."

-- from "Where does all the snot come from?", by Nina Kristiansen (translated by Glenn Ostling), 2012

[Note that despite the last line of the quoted section, other parts of the article explain why snot is biologically important for us.]

(I have been unlucky enough to get two different flus this season, despite having gotten the vaccine months earlier (main strain mutated after the vaccine was made, and strains they didn't expect to be big started going around, so not the most effective year for flu vaccines). So: a quotation about snot, which I currently have more than my share of.)