I have no idea what you already know about it since you didn’t tell us, but here’s what I could figure out.
First off it’s a latin palindrome traceable back to the middle ages. It translates to “We go wandering at night and are consumed by fire”. It was said to be a poetic description of the behavior of moths.
As it’s a palindrome it can be read either backwards or forwards and will convey the same message.
“those who know don’t say – those who say don’t know”