en_tn/luk/02/35.md

the thoughts of many hearts may be revealed

Here "hearts" is a metonym for people's inner beings. This can be stated in active form. Alternate translation: "he may reveal the thoughts of many people" or "he may reveal what many people secretly think" (See: rc://en/ta/man/translate/figs-metonymy and rc://en/ta/man/translate/figs-activepassive)