“He said to them, "Where is your faith?" And they were afraid, and they marveled …” (v25). The disciples saw their Master Jesus verbally rebuke a raging storm, and it calmed down. They reacted with both fear and amazement, realizing that Jesus was Lord over even “wind and water.” When the townspeople saw that Jesus had freed a demon-possessed man, they also reacted with “great fear,” but rather worshipping, they begged Jesus to leave them (v37).
“Do not fear, only believe …” (v50). Fear turns to trust when we open our hearts to Jesus; then we experience His great power not as judgment, but as mercy.