en_tn_lite_do_not_use/1th/02/04.md

approved by God to be trusted

Paul was tested and proven trustworthy by God.

We speak

Paul is referring to preaching the gospel message. (See: rc://en/ta/man/translate/figs-explicit)

who examines our hearts

The word "hearts" is a metonym for a person's desires and thoughts. AT: "who knows our desires and thoughts" (See: rc://en/ta/man/translate/figs-metonymy)