Exactly… actions, not words.
Wait, do you mean as in A, B, C, etc.? I think I know where the problem is now…
I wouldn’t… and I’ll show you why…
https://lettres.sorbonne-universite.fr/faculte-des-lettres/la-faculte-des-lettres
…in this case I’d translate “Lettres” as “Arts and Humanities”… also compare with this
So as far as an English translation of Seneca, I wouldn’t… there are way too many things to consider given that the text is 2,000 years old. You probably need a paragraph to explain each sentence. There are certain style aspects to consider, such as saying “roofs” instead of “houses,” which is called a pars pro toto (“a part for the whole”). We kind of have it today still in the expression “have a roof over your head” which of course also includes the rest of the house.
Then you got the opposite, totem pro parte, where I can refer to the US by saying America, even though that’s not a country but in the context of countries you can refer to the US (part) as America (total). Obviously, it’s not literally raining “cats and dogs” when somebody says that… and many, many more issues. But to avoid the specific problem:
Google translate offers “uneducated” as an alternative; however, that is not quite right either… because you are referring back to the liberal arts of course (that the person is “ignorant” of). The rest of the automated translation is nonsense by the way.
Anyway, to sum it up… you see how he doesn’t mean literal “letters” that somehow mean
That’s what I already tried to say earlier…
…hope this makes more sense now. “no formal education” = “uneducated” (Google) = “ignorant of letters” (your quote)
