en_tn/1th/03/01.md

we could no longer bear it

"we could no longer endure worrying about you." The word "we" refers to Paul, Silvanus, and Timothy but excludes the Thessalonian believers. (See: rc://en/ta/man/translate/figs-exclusive)

good to be left behind at Athens alone

"good for Silvanus and I to stay behind in Athens"

Athens

a city in Achaia province which is now modern day Greece (See: rc://en/ta/man/translate/translate-names)

our brother

"our fellow Christian"

no one would be disturbed

"no one would be troubled" or "no one would be moved"

we are appointed

"we are destined"