# General Information:
The word "them" refers to the Gentiles, and both instances of "you" are plural. (See: [[rc://en/ta/man/translate/figs-you]])
# who knows the heart
Here "heart" refers to the "minds" or "inner beings." Alternate translation: "who knows the people's minds" or "who knows what people think" (See: [[rc://en/ta/man/translate/figs-metonymy]])
# has testified to them
"has testified to the Gentiles"
# giving them the Holy Spirit
"causing the Holy Spirit to come upon them"