15 Jesus therefore knowing that they were going to come and seize him, that they might make [him] king, departed again to the mountain himself alone.
16 But when evening was come, his disciples went down to the sea, 17 and having gone on board ship, they went over the sea to Capernaum. And it had already become dark, and Jesus had not come to them, 18 and the sea was agitated by a strong wind blowing. 19 Having rowed then about twenty-five or thirty stadia, they see Jesus walking on the sea and coming near the ship; and they were frightened. 20 But he says to them, It is I: be not afraid. 21 They were willing therefore to receive him into the ship; and immediately the ship was at the land to which they went.
Matthew Henry's Commentary on John 6:15-21
Commentary on John 6:15-21
(Read John 6:15-21)
Here were Christ's disciples in the way of duty, and Christ was praying for them; yet they were in distress. There may be perils and afflictions of this present time, where there is an interest in Christ. Clouds and darkness often surround the children of the light and of the day. They see Jesus walking on the sea. Even the approaches of comfort and deliverance often are so mistaken, as to become the occasions of fear. Nothing is more powerful to convince sinners than that word, "I am Jesus whom thou persecutest;" nothing more powerful to comfort saints than this, "I am Jesus whom thou lovest." If we have received Christ Jesus the Lord, though the night be dark, and the wind high, yet we may comfort ourselves, we shall be at the shore before long.