en_tn/2th/03/04.md

in the Lord

"joined to the Lord" (UDB)

we

we - “we” refers to Paul, Silas and Timothy but not their audience. (See: rc://en/ta/man/translate/figs-exclusive)

concerning

concerning - "about"

you

“you” and "your" refer to the Thessalonian believers. (See: rc://en/ta/man/translate/figs-you)

direct your hearts

This is an expression that refers to the believers not just a body part. "guide your hearts" (See: rc://en/ta/man/translate/figs-synecdoche)