In this lesson, He puts much greater fears to rest. In chronological order, the disciples are afraid of the storm, a supposed apparition coming toward them, and finally the wind and waves. It is I. Don't be afraid. I have written before that guilt and worry are opposite sides of the same coin. They are the same emotion, divided only by the direction we are looking.
People look back and feel guilt, or they look ahead and worry.
If the forward vision is intense, we can call the emotion fear. The only difference between worry and fear is the intensity of the feeling. This trinity of emotion is one of the most destructive forces in human life. Jesus confronts all three aspects of it and demonstrates how faith in Him relieves all of it. One of the surest things that you can count on in this life is that you cannot live a rich, good, meaningful and joyful life in the present if you are stretched out emotionally between the past and the future.