en_tn/psa/044/021.md

would not God search this out?

The writer uses this question to express that God would know if they worshiped another god. AT: "God would certainly find out" (See: rc://en/ta/man/translate/figs-rquestion)

he knows the secrets of the heart

Here the word "heart" refers to the mind and thoughts. AT: "he knows what a person secretly thinks" (See: rc://en/ta/man/translate/figs-metonymy)