I was struck by the latin proverb in the subject heading. Somebody on the BPL community uses it as a tag line, but now I've lost track of who that is.
I emailed my daughter the classicist (he says proudly) to ask about its origins and meanings, and she responded as follows:
. . . it's am old latin proverb that means "I carry all
my things with me, " but more literally it means "I carry my everything with me." It's not good English, but it's closer to the true meaning.
"Everything" in this case means everything that's important, your reputation, your character, your natural abilities, your intelligence, and such -- all the things that define you as ha human being. The rest are just trappings.
The phrase shows up in a lot of texts, most notably in Cicero's "Stoic Paradoxes" and one of Seneca's philosophical epistles.
It's a good pun for a backpacker. Next time you communicate with him, tell him I like it.