Mark 6:45-52
45 Immediately Jesus made his disciples get into the boat and go on ahead of him to Bethsaida, while he dismissed the crowd.
46 After leaving them, he went up on a mountainside to pray.
47 When evening came, the boat was in the middle of the lake, and he was alone on land.
48 He saw the disciples straining at the oars, because the wind was against them. About the fourth watch of the night he went out to them, walking on the lake. He was about to pass by them,
49 but when they saw him walking on the lake, they thought he was a ghost. They cried out,
50 because they all saw him and were terrified. Immediately he spoke to them and said, "Take courage! It is I. Don't be afraid."
51 Then he climbed into the boat with them, and the wind died down. They were completely amazed,
52 for they had not understood about the loaves; their hearts were hardened.

The Scriptures makes it clear that Jesus made his disciples to get into the boat to go on ahead of him, while he is dismissing the crowd. It looks like Jesus had something in mind in sending them away like that. Of course there was the urge for him to spend time with the Father, so he went up on a mountainside and prayed. While praying, Jesus did look at the disciples down in the middle of the lake, straining at the oars, because the wind was against them. But Jesus decided to stay and pray till the fourth watch of the night, that means till 3am. I am sure the disciples are tired, exhausted and sleepy. And Jesus came to them walking on the water. They were utterly terrified by the sight. Even though Jesus was about to pass them by, he spoke to them, encouraged them and helped them.

By saying "It is I" (resembles to "I AM" in the Old Testament, when God referred to himself), Jesus makes it clear to them that He is Lord. But then why he needed the 5 loaves and 2 fishes? Jesus could have done it out of nothing! Something in the end tells me that Jesus meant it when he asked them to go ahead of him. V52 says their hearts were hardened. They could not understand why Jesus wanted to take away their loaves. So they missed out the 12 basketful of loaves they collected.

If we are grumpy and holding grudge with the requirements of Jesus in our life, or may be the demands of the church, we may miss out a lot of blessing, which are taking place right in front of our eyes. But if we have the heart of Jesus, desperate to be grateful, eager to spent time with God, we will see ourselves rocking on troubled waters.