In short
We should not fear being persecuted, but rather stand in awe of God. Fearing God is not like fearing man, but the same verb is apt for both, because it concerns being driven either by fear or by awe. This contrast also shows that the One destroying the body in hell is not Satan but God himself.
We ought to not allow ourselves to be guided by the fear of being persecuted on earth, but only by the awe we have for God in heaven. Fearing God is therefore very different from fearing man. Yet the same verb can be used in both instances precisely because it concerns being driven either by this fear or by this awe. This contrast also clarifies that the One actively destroying the body in hell is not Satan but God himself.1
28 And do not fear those who kill the body but cannot kill the soul. Rather fear him who can destroy both soul and body in hell.