15 Jesus saw that in their enthusiasm, they were about to grab him and make him king, so he slipped off and went back up the mountain to be by himself.
16 In the evening his disciples went down to the sea, 17 got in the boat, and headed back across the water to Capernaum. It had grown quite dark and Jesus had not yet returned. 18 A huge wind blew up, churning the sea. 19 They were maybe three or four miles out when they saw Jesus walking on the sea, quite near the boat. They were scared senseless, 20 but he reassured them, "It's me. It's all right. Don't be afraid." 21 So they took him on board. In no time they reached land - the exact spot they were headed to.
22 The next day the crowd that was left behind realized that there had been only one boat, and that Jesus had not gotten into it with his disciples. They had seen them go off without him. 23 By now boats from Tiberias had pulled up near where they had eaten the bread blessed by the Master. 24 So when the crowd realized he was gone and wasn't coming back, they piled into the Tiberias boats and headed for Capernaum, looking for Jesus.
Matthew Henry's Commentary on John 6:15-24
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.
Commentary on John 6:22-27
(Read John 6:22-27)
Instead of answering the inquiry how he came there, Jesus blamed their asking. The utmost earnestness should be employed in seeking salvation, in the use of appointed means; yet it is to be sought only as the gift of the Son of man. Him the Father has sealed, proved to be God. He declared the Son of man to be the Son of God with power.