Here "refresh" is a metaphor for comfort or encourage. Here "heart" is a metonym for a person's feelings, thoughts, or inner being. How Paul wanted Philemon to refresh his heart can be made explicit. Alternate translation: "encourage me in Christ" or "comfort me in Christ" or "refresh my heart in Christ by accepting Onesimus kindly" (See: [[rc://en/ta/man/translate/figs-metaphor]] and [[rc://en/ta/man/translate/figs-metonymy]] and [[rc://en/ta/man/translate/figs-explicit]])