TO DOUBT, to waver between two — from dis, 'twice' or 'two ways', so the verb itself pictures a mind split between directions rather than simple unbelief. ⚠ It occurs only twice in the entire New Testament, and both times in this Gospel, both times of someone who has already seen real evidence and hesitates anyway: Peter, walking on the water until he 'sees the wind' (Matthew 14:31), and the Eleven on the mountain at the very end of the book, worshiping the risen Christ and yet — 'some doubted' (28:17, not yet on these pages). Neither doubter is condemned or expelled; both remain, in the boat and on the mountain, with everyone else. → first discussed at Matt 14:31