For they understood not the miracle of the loaves: for their hearts were hardened.
All Commentaries on Mark 6:52 Go To Mark 6
Theophylact of Ochrid
AD 1107
But when He had dismissed the crowd, He goes up to pray, for prayer requires rest and silence.
Now the Lord permitted His disciples to be in danger, that they might learn patience; wherefore He did not immediately come to their aid, but allowed them to remain in danger all night, that He might teach them to wait patiently, and not to hope at once for help in tribulations.For there follows: “And He saw them toiling in rowing, for the wind was contrary unto them: and about the fourth watch of the night, He cometh unto them walking upon the sea.”
Then by entering into the ship, the Lord restrained the tempest. For it continues, “And He went up unto them into the ship, and the wind ceased.” Great indeed is the miracle of our Lord's walking on the sea, but the tempest and the contrary wind were there as well, to make the miracle greater. For the Apostles, not understanding from the miracle of the five loaves the power of Christ, now more fully knew it from the miracle of the sea. Wherefore it goes on, “And they were sore amazed in themselves.” For they understood not concerning the loaves.