The Markan pericope found in 4.35-41 can be viewed as a story about the issue of faith. Probably that's the way it should be seen given that the disciples lack of faith is what Jesus focussed immediately upon after he stilled the waters and winds. But what is this lack of faith about? The disciples had seen Jesus do some mighty miracles and so they had faith in him to do such things. But their faith was being tested in a new arena, the arena in which some of them earned their living fishing, in the area of what is called "nature". Their fear took the form of chiding the sleeping Jesus with failing to show any care towards the danger of their perishing by drowning. They failed to understand that if Jesus was with them then nothing ultimately bad could befall them. The boat may even founder but they would be "saved" because he was their salvation. I choose to believe that as these disciples experienced Jesus as Lord of wind, water and storm, their faith in him...
we look not to the things that are seen but to the things that are unseen --Paul, Apostle to the Gentiles