Because God is judge in the end, we should not fear even persecutors who threaten death (vv. 26, 28). Mortals can destroy only one's body, while God can resurrect the body for damnation and destroy the whole person (with eternal torture; compare 3:12; 25:46). The choice is not between courage and fear but has to do with whom we will fear more (Minear 1950:169). Jesus may here recall the Jewish martyr tradition, which exhorted its followers not to fear those who think they can kill, because eternal suffering awaits the soul that disobeys God's command (4 Macc 13:14-15).