The Church teaches that Jesus is God and man. He is fully divine and fully human.
As much as there are many theological reflections done on that, how we are to understand it may depend on our encounter and experience of who Jesus is to us.
In the gospel, the disciples had only come to the understanding that Jesus was only human.
They had seen the multiplication of loaves. For them, a hunger problem was solved and they may still be wondering about the deeper meaning of it.
Then as they saw Jesus walking on the water, they thought He was a ghost and they cried out in fear.
It was only when Jesus got into the boat and the wind dropped and all was calm that they were utterly and completely dumbfounded.
They had encountered the humanity of Jesus but they had yet to understand the divinity of Jesus.
As for us, we may understand a bit of both. We acknowledge that Jesus is our Saviour and we also see Him as one who came to be with us.
We turn to Jesus in our difficulties because we know that He will understand because He was human like us.
We turn to Him for divine assistance for we believe that He can make all things possible.
But more importantly, let us love God and neighbour. That is what Jesus came to show us. That is what He wants us to do if we really believe in Him.