48 And he saw that they were making headway painfully, for the wind was against them. And about the fourth watch of the night[1] he came to them, walking on the sea. He meant to pass by them, 49 but when they saw him walking on the sea they thought it was a ghost, and cried out, 50 for they all saw him and were terrified. But immediately he spoke to them and said, "Take heart; it is I. Do not be afraid."
Matthew Henry's Commentary on Mark 6:48-50
Commentary on Mark 6:45-56
(Read Mark 6:45-56)
The church is often like a ship at sea, tossed with tempests, and not comforted: we may have Christ for us, yet wind and tide against us; but it is a comfort to Christ's disciples in a storm, that their Master is in the heavenly mount, interceding for them. And no difficulties can hinder Christ's appearance for his people, when the set time is come. He silenced their fears, by making himself known to them. Our fears are soon satisfied, if our mistakes are set right, especially our mistakes as to Christ. Let the disciples have their Master with them, and all is well. It is for want of rightly understanding Christ's former works, that we view his present works as if there never were the like before. If Christ's ministers now could cure people's bodily diseases, what multitudes would flock after them! It is sad to think how much more most care about their bodies than about their souls.