John 21:4 - Clarke's commentary and critical notes on the Bible

But when the morning was now come, Jesus stood on the shore: but the disciples knew not that it was Jesus. Knew not that it was Jesus - Probably because it was either not light enough, or he was at too great a distance, or he had assumed another form, as in Mark 16:12; otherwise his person was so remarkable that all his disciples readily knew him when he was at hand: see John 21:12.