ESV - 40 He said to them, "Why are you so afraid? Have you still no faith?
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When Jesus tells me to do something for his kingdom I immediately look to my own resources to accomplish it. But when obstacles get in the way I start to doubt my ability to complete the task and then hear Jesus say "Do you still have no faith?"
This storm story powerfully reminds me that when Jesus tells me to do something for his kingdom (which he does every day) like "let's go across to the other side of the lake", then nothing on earth or in heaven can stop me from completing the task, because it doesn't depend on my resources - just his.